diff --git a/scripts/go.sh b/scripts/go.sh
index e2014622..85e840da 100755
--- a/scripts/go.sh
+++ b/scripts/go.sh
@@ -6,7 +6,10 @@ script_dir="$(cd -P "$(dirname "$BASH_SOURCE")" && pwd)"
 cd $script_dir
 . set.sh
 
-apt-get -y install golang
+wget https://dl.google.com/go/go1.13.6.linux-amd64.tar.gz
+tar -C /usr/local -xzf go1.13.6.linux-amd64.tar.gz
+rm go1.13.6.linux-amd64.tar.gz
+echo 'export PATH=$PATH:/usr/local/go/bin' >> /etc/profile
 
 # Set-up all users
 for dir in $(ls -1d /root /home/* 2>/dev/null ||:)
@@ -15,7 +18,7 @@ do
 	cat <<-'EOF'>> $dir/.bashrc
 	GOPATH=$HOME/go
 	PATH=$PATH:$GOPATH/bin
-	alias gobuild='CGO_ENABLED=0 GOOS=linux GOARCH=amd64 go build -ldflags="-s -w"'
+	alias gobuild='CGO_ENABLED=0 GOOS=linux GOARCH=amd64 go build -trimpath -ldflags="-s -w"'
 	EOF
 	echo 'GOPATH=$HOME/go' >> $dir/.profile
 
diff --git a/scripts/vscode.sh b/scripts/vscode.sh
index c0735d2b..defc61dd 100755
--- a/scripts/vscode.sh
+++ b/scripts/vscode.sh
@@ -6,8 +6,9 @@ script_dir="$(cd -P "$(dirname "$BASH_SOURCE")" && pwd)"
 cd $script_dir
 . set.sh
 
-wget https://github.com/VSCodium/vscodium/releases/download/1.40.2/codium_1.40.2-1574798581_amd64.deb
-dpkg -i codium_1.40.2-1574798581_amd64.deb
+wget https://github.com/VSCodium/vscodium/releases/download/1.41.1/codium_1.41.1-1576787344_amd64.deb
+dpkg -i codium_1.41.1-1576787344_amd64.deb
+rm codium_1.41.1-1576787344_amd64.deb
 
 ln -s /usr/bin/codium /usr/local/bin/code
 
diff --git a/subjects/ascii-art-web/ascii-art-web-dockerize.audit.en.md b/subjects/ascii-art-web/ascii-art-web-dockerize.audit.en.md
index e5c82912..c803eab7 100644
--- a/subjects/ascii-art-web/ascii-art-web-dockerize.audit.en.md
+++ b/subjects/ascii-art-web/ascii-art-web-dockerize.audit.en.md
@@ -42,7 +42,7 @@ student$
 #### Basic
 
 ###### +Does the server run quickly and effectively? (Favoring recursive, no unnecessary data requests, etc)
-###### +Does the code obey the [good practices](https://github.com/01-edu/public/blob/master/subjects/good-practices.en.md)?
+###### +Does the code obey the [good practices](https://public.01-edu.org/subjects/good-practices.en)?
 
 ###### +Is there a test file for this code?
 ###### +Are the tests checking each possible case?
diff --git a/subjects/ascii-art-web/ascii-art-web-dockerize.en.md b/subjects/ascii-art-web/ascii-art-web-dockerize.en.md
index 0fb4d2be..8445a03f 100644
--- a/subjects/ascii-art-web/ascii-art-web-dockerize.en.md
+++ b/subjects/ascii-art-web/ascii-art-web-dockerize.en.md
@@ -2,7 +2,7 @@
 
 ### Objectives
 
-You must follow the same [principles](https://github.com/01-edu/public/blob/master/subjects/ascii-art-web/ascii-art-web.en.md) as the first subject.
+You must follow the same [principles](https://public.01-edu.org/subjects/ascii-art-web/ascii-art-web.en) as the first subject.
 
 - For this project you must create at least :
   - one Dockerfile
@@ -32,7 +32,7 @@ This project will help you learn about :
 ### Instructions
 
 - The web server must be created in **Go**.
-- The code must respect the [good practices](https://github.com/01-edu/public/blob/master/subjects/good-practices.en.md).
+- The code must respect the [good practices](https://public.01-edu.org/subjects/good-practices.en).
 - You must use Docker.
 - The project must have a **Dockerfile**.
 - Your Dockerfile must respect the [Dockerfile good practices](https://docs.docker.com/develop/develop-images/dockerfile_best-practices/).
diff --git a/subjects/ascii-art-web/ascii-art-web-export-file.audit.en.md b/subjects/ascii-art-web/ascii-art-web-export-file.audit.en.md
index 0a6e8104..19974e99 100644
--- a/subjects/ascii-art-web/ascii-art-web-export-file.audit.en.md
+++ b/subjects/ascii-art-web/ascii-art-web-export-file.audit.en.md
@@ -16,7 +16,7 @@
 
 #### Basic
 
-###### +Does the code obey the [good practices](https://github.com/01-edu/public/blob/master/subjects/good-practices.en.md)?
+###### +Does the code obey the [good practices](https://public.01-edu.org/subjects/good-practices.en)?
 ###### +Are the instructions in the website clear?
 ###### +Does the project run using an API?
 ###### +Can you export in multiple formats?
diff --git a/subjects/ascii-art-web/ascii-art-web-export-file.en.md b/subjects/ascii-art-web/ascii-art-web-export-file.en.md
index 56fc7904..8051e5f3 100644
--- a/subjects/ascii-art-web/ascii-art-web-export-file.en.md
+++ b/subjects/ascii-art-web/ascii-art-web-export-file.en.md
@@ -2,11 +2,11 @@
 
 ### Objectives
 
-You must follow the same [principles](https://github.com/01-edu/public/blob/master/subjects/ascii-art-web/ascii-art-web.en.md) as the first subject.
+You must follow the same [principles](https://public.01-edu.org/subjects/ascii-art-web/ascii-art-web.en) as the first subject.
 
 Ascii-art-web-export consists on making sure that it is possible to export the output of the web application, at least in one export format at your choice.
 
-- You should be able to export the result of the [ascii-art](https://github.com/01-edu/public/blob/master/subjects/ascii-art/ascii-art.en.md) project implemented in the website.
+- You should be able to export the result of the [ascii-art](https://public.01-edu.org/subjects/ascii-art/ascii-art.en) project implemented in the website.
 - The file must be exported with the right permissions (**read and write**) for the user.
 
 This project will help you learn about :
@@ -24,4 +24,4 @@ This project will help you learn about :
 - The web server must export at least in one export format.
 - The web server must be created in **Go**.
 - You must handle website errors.
-- The code must respect the [good practices](https://github.com/01-edu/public/blob/master/subjects/good-practices.en.md).
+- The code must respect the [good practices](https://public.01-edu.org/subjects/good-practices.en).
diff --git a/subjects/ascii-art-web/ascii-art-web-stylize.audit.en.md b/subjects/ascii-art-web/ascii-art-web-stylize.audit.en.md
index 44f13841..c96a75cf 100644
--- a/subjects/ascii-art-web/ascii-art-web-stylize.audit.en.md
+++ b/subjects/ascii-art-web/ascii-art-web-stylize.audit.en.md
@@ -16,7 +16,7 @@
 ###### +Is the output of the program well structured? Does any letter seems to be out of line?
 ###### +Is there a test file for this code?
 ###### +Are the tests checking each possible case?
-###### +Does the code obey the [good practices](https://github.com/01-edu/public/blob/master/subjects/good-practices.en.md)?
+###### +Does the code obey the [good practices](https://public.01-edu.org/subjects/good-practices.en)?
 
 #### Social
 
diff --git a/subjects/ascii-art-web/ascii-art-web-stylize.en.md b/subjects/ascii-art-web/ascii-art-web-stylize.en.md
index 47261eb3..02248429 100644
--- a/subjects/ascii-art-web/ascii-art-web-stylize.en.md
+++ b/subjects/ascii-art-web/ascii-art-web-stylize.en.md
@@ -2,7 +2,7 @@
 
 ### Objectives
 
-You must follow the same [principles](https://github.com/01-edu/public/blob/master/subjects/ascii-art-web/ascii-art-web.en.md) as the first subject.
+You must follow the same [principles](https://public.01-edu.org/subjects/ascii-art-web/ascii-art-web.en) as the first subject.
 
 Ascii-art-stylize consists on making your site :
 
@@ -19,7 +19,7 @@ This project will help you learn about:
 ### Instructions
 
 - Your project must contain **CSS**.
-- The code must respect the [**good practices**](https://github.com/01-edu/public/blob/master/subjects/good-practices.en.md).
+- The code must respect the [**good practices**](https://public.01-edu.org/subjects/good-practices.en).
 - We suggest you to search for the principles of a good website design.
 
 - It must be possible to see the text properly despite the colors used.
diff --git a/subjects/ascii-art-web/ascii-art-web.audit.en.md b/subjects/ascii-art-web/ascii-art-web.audit.en.md
index 77b59ea8..56ddea54 100644
--- a/subjects/ascii-art-web/ascii-art-web.audit.en.md
+++ b/subjects/ascii-art-web/ascii-art-web.audit.en.md
@@ -84,7 +84,7 @@ o-o-o o--o o-o          o   o      o   o-o  | |  o   o
 #### Basic
 
 ###### +Does the server run quickly and effectively? (Favoring recursive, no unnecessary data requests, etc)
-###### +Does the code obey the [good practices](https://github.com/01-edu/public/blob/master/subjects/good-practices.en.md)?
+###### +Does the code obey the [good practices](https://public.01-edu.org/subjects/good-practices.en)?
 
 ###### +Is there a test file for this code?
 ###### +Are the tests checking each possible case?
diff --git a/subjects/ascii-art-web/ascii-art-web.en.md b/subjects/ascii-art-web/ascii-art-web.en.md
index 791e76bd..13433210 100644
--- a/subjects/ascii-art-web/ascii-art-web.en.md
+++ b/subjects/ascii-art-web/ascii-art-web.en.md
@@ -4,7 +4,7 @@
 
 Ascii-art-web consists in creating and running a server, in which it will be possible to use a web **GUI** (graphical user interface) version of your last project, ascii-art.
 
-- You must use your [ascii-art](https://github.com/01-edu/public/blob/master/subjects/ascii-art/ascii-art.en.md) application for this project.
+- You must use your [ascii-art](https://public.01-edu.org/subjects/ascii-art/ascii-art.en) application for this project.
 - You can run your server **locally** (localhost) or using an **API**.
 - You must use the different [banners](https://github.com/01-edu/public/tree/master/subjects/ascii-art) for the website.
 - It should be available to choose between the banners.
@@ -28,7 +28,7 @@ This project will help you learn about :
 
 - You must handle website errors.
 - The web server must be created in **Go**.
-- The code must respect the [good practices](https://github.com/01-edu/public/blob/master/subjects/good-practices.en.md).
+- The code must respect the [good practices](https://public.01-edu.org/subjects/good-practices.en).
 - The project must have files written in **HTML**.
 
 ### Usage
diff --git a/subjects/ascii-art/ascii-art-color.en.md b/subjects/ascii-art/ascii-art-color.en.md
index f1890703..98d15609 100644
--- a/subjects/ascii-art/ascii-art-color.en.md
+++ b/subjects/ascii-art/ascii-art-color.en.md
@@ -2,7 +2,7 @@
 
 ### Objectives
 
-You must follow the same [instructions](https://github.com/01-edu/public/blob/master/subjects/ascii-art/ascii-art.en.md) as in the first subject but with colors.
+You must follow the same [instructions](https://public.01-edu.org/subjects/ascii-art/ascii-art.en) as in the first subject but with colors.
 
 - The output should manipulate colors using the **flag** `--color=<color>`, in which `--color` is the flag and `<color>` is the color of choice.
 - The colors must respect the [RGB](https://en.wikipedia.org/wiki/RGB_color_model) concept.
@@ -23,5 +23,5 @@ This project will help you learn about :
 ### Instructions
 
 - Your project must be written in **Go**.
-- The code must respect the [**good practices**](https://github.com/01-edu/public/blob/master/subjects/good-practices.en.md).
+- The code must respect the [**good practices**](https://public.01-edu.org/subjects/good-practices.en).
 - It is recommended that the code should present a **test file**.
diff --git a/subjects/ascii-art/ascii-art-fs.audit.en.md b/subjects/ascii-art/ascii-art-fs.audit.en.md
index 7ee94034..8f38254e 100644
--- a/subjects/ascii-art/ascii-art-fs.audit.en.md
+++ b/subjects/ascii-art/ascii-art-fs.audit.en.md
@@ -75,14 +75,14 @@ o      \     /
 ###### Does it display the string in the right template as an ASCII art representation as above?
 ##### Try passing as arguments `ABCDEFGHIJKLMNOPQRSTUVWXYZ shadow`
 ```
-                                                                                                                                                                                                                                                               
-  _|_|   _|_|_|     _|_|_| _|_|_|   _|_|_|_| _|_|_|_|   _|_|_| _|    _| _|_|_|       _| _|    _| _|       _|      _| _|      _|   _|_|   _|_|_|     _|_|     _|_|_|     _|_|_| _|_|_|_|_| _|    _| _|      _| _|          _| _|      _| _|      _| _|_|_|_|_|  
-_|    _| _|    _| _|       _|    _| _|       _|       _|       _|    _|   _|         _| _|  _|   _|       _|_|  _|_| _|_|    _| _|    _| _|    _| _|    _|   _|    _| _|           _|     _|    _| _|      _| _|          _|   _|  _|     _|  _|         _|    
-_|_|_|_| _|_|_|   _|       _|    _| _|_|_|   _|_|_|   _|  _|_| _|_|_|_|   _|         _| _|_|     _|       _|  _|  _| _|  _|  _| _|    _| _|_|_|   _|  _|_|   _|_|_|     _|_|       _|     _|    _| _|      _| _|    _|    _|     _|         _|         _|      
-_|    _| _|    _| _|       _|    _| _|       _|       _|    _| _|    _|   _|   _|    _| _|  _|   _|       _|      _| _|    _|_| _|    _| _|       _|    _|   _|    _|       _|     _|     _|    _|   _|  _|     _|  _|  _|     _|  _|       _|       _|        
-_|    _| _|_|_|     _|_|_| _|_|_|   _|_|_|_| _|         _|_|_| _|    _| _|_|_|   _|_|   _|    _| _|_|_|_| _|      _| _|      _|   _|_|   _|         _|_|  _| _|    _| _|_|_|       _|       _|_|       _|         _|  _|     _|      _|     _|     _|_|_|_|_|  
-                                                                                                                                                                                                                                                               
-                                                                                                                                                                                                                                                               
+                                                                                                                                                                                                                                                              
+  _|_|   _|_|_|     _|_|_| _|_|_|   _|_|_|_| _|_|_|_|   _|_|_| _|    _| _|_|_|       _| _|    _| _|       _|      _| _|      _|   _|_|   _|_|_|     _|_|     _|_|_|     _|_|_| _|_|_|_|_| _|    _| _|      _| _|          _| _|      _| _|      _| _|_|_|_|_| 
+_|    _| _|    _| _|       _|    _| _|       _|       _|       _|    _|   _|         _| _|  _|   _|       _|_|  _|_| _|_|    _| _|    _| _|    _| _|    _|   _|    _| _|           _|     _|    _| _|      _| _|          _|   _|  _|     _|  _|         _|   
+_|_|_|_| _|_|_|   _|       _|    _| _|_|_|   _|_|_|   _|  _|_| _|_|_|_|   _|         _| _|_|     _|       _|  _|  _| _|  _|  _| _|    _| _|_|_|   _|  _|_|   _|_|_|     _|_|       _|     _|    _| _|      _| _|    _|    _|     _|         _|         _|     
+_|    _| _|    _| _|       _|    _| _|       _|       _|    _| _|    _|   _|   _|    _| _|  _|   _|       _|      _| _|    _|_| _|    _| _|       _|    _|   _|    _|       _|     _|     _|    _|   _|  _|     _|  _|  _|     _|  _|       _|       _|       
+_|    _| _|_|_|     _|_|_| _|_|_|   _|_|_|_| _|         _|_|_| _|    _| _|_|_|   _|_|   _|    _| _|_|_|_| _|      _| _|      _|   _|_|   _|         _|_|  _| _|    _| _|_|_|       _|       _|_|       _|         _|  _|     _|      _|     _|     _|_|_|_|_| 
+                                                                                                                                                                                                                                                              
+                                                                                                                                                                                                                                                              
 ```
 ###### Does it display the string in the right template as an ASCII art representation as above?
 ##### Try passing as arguments `\"#$%&/()*+,-./ thinkertoy`
@@ -134,7 +134,7 @@ o-O-o  o    o-o         o   o   o-o o   o  o | o  o o--O
 ###### +Is the output of the program well structured? Does any letter seems to be out of line?
 ###### +Is there a test file for this code?
 ###### +Are the tests checking each possible case?
-###### +Does the code obey the [good practices](https://github.com/01-edu/public/blob/master/subjects/good-practices.en.md)?
+###### +Does the code obey the [good practices](https://public.01-edu.org/subjects/good-practices.en)?
 
 #### Social
 
diff --git a/subjects/ascii-art/ascii-art-fs.en.md b/subjects/ascii-art/ascii-art-fs.en.md
index 9e6c66e0..066241f9 100644
--- a/subjects/ascii-art/ascii-art-fs.en.md
+++ b/subjects/ascii-art/ascii-art-fs.en.md
@@ -2,7 +2,7 @@
 
 ### Objectives
 
-You must follow the same [instructions](https://github.com/01-edu/public/blob/master/subjects/ascii-art/ascii-art.en.md) as in the first subject but the second argument must be the name of the template.
+You must follow the same [instructions](https://public.01-edu.org/subjects/ascii-art/ascii-art.en) as in the first subject but the second argument must be the name of the template.
 
 This project will help you learn about :
 
@@ -16,9 +16,9 @@ This project will help you learn about :
 ### Instructions
 
 - Your project must be written in **Go**.
-- The code must respect the [**good practices**](https://github.com/01-edu/public/blob/master/subjects/good-practices.en.md).
+- The code must respect the [**good practices**](https://public.01-edu.org/subjects/good-practices.en).
 - It is recommended that the code should present a **test file**.
-- You can see all about the **banners** [here](https://github.com/01-edu/public/tree/master/subjects/ascii-art/ascii-art.en.md).
+- You can see all about the **banners** [here](https://github.com/01-edu/public/tree/master/subjects/ascii-art).
 
 ### Usage
 
@@ -33,7 +33,7 @@ student@ubuntu:~/ascii-art$ ./ascii-art "hello" standard
  |_| |_|   \___|  |_|  |_|   \___/  
                                     
                                     
-student@ubuntu:~/ascii-art$ ./ascii-art "Hello There" shadow
+student@ubuntu:~/ascii-art$ ./ascii-art "Hello There!" shadow
                                                                                          
 _|    _|          _| _|                _|_|_|_|_| _|                                  _| 
 _|    _|   _|_|   _| _|   _|_|             _|     _|_|_|     _|_|   _|  _|_|   _|_|   _| 
@@ -42,7 +42,7 @@ _|    _| _|       _| _| _|    _|           _|     _|    _| _|       _|       _|
 _|    _|   _|_|_| _| _|   _|_|             _|     _|    _|   _|_|_| _|         _|_|_| _| 
                                                                                          
                                                                                          
-student@ubuntu:~/ascii-art$ ./ascii-art "Hello There" thinkertoy
+student@ubuntu:~/ascii-art$ ./ascii-art "Hello There!" thinkertoy
                                                 
 o  o     o o           o-O-o o                  
 |  |     | |             |   |                o 
diff --git a/subjects/ascii-art/ascii-art-justify.audit.en.md b/subjects/ascii-art/ascii-art-justify.audit.en.md
index c898f0ee..80c70d19 100644
--- a/subjects/ascii-art/ascii-art-justify.audit.en.md
+++ b/subjects/ascii-art/ascii-art-justify.audit.en.md
@@ -1,41 +1,40 @@
 #### Functional Project Questions
 
-##### Try passing as arguments `left standard --align=right`
+##### Try passing as arguments `"left standard --align=right"`
 ###### Does it displays the correct result at the right side?
 
-##### Try passing as arguments `right standard --align=left`
+##### Try passing as arguments `"right standard --align=left"`
 ###### Does it displays the correct result at the left side?
 
-##### Try passing as arguments `hello shadow --align=center`
+##### Try passing as arguments `"hello shadow --align=center"`
 ###### Does it displays the correct result at the center?
 
-##### Try passing as arguments `"1 Two 4" shadow --align=justify`
+##### Try passing as arguments `""1 Two 4" shadow --align=justify"`
 ###### Does it displays the correct result justified?
 
-##### Try passing as arguments `23/32 standard --align=right`
+##### Try passing as arguments `"23/32 standard --align=right"`
 ###### Does it displays the correct result at the right side?
 
-##### Try passing as arguments `ABCabc123 thinkertoy--align=right`
+##### Try passing as arguments `"ABCabc123 thinkertoy--align=right"`
 ###### Does it displays the correct result at the right side?
 
-##### Try passing as arguments `!#$%&" thinkertoy --align=cente`
+##### Try passing as arguments `"!#$%&" thinkertoy --align=cente"`
 ###### Does it displays the correct result at the center?
 
-##### Try passing as arguments `"23Hello World!" standard --align=left`
+##### Try passing as arguments `""23Hello World!" standard --align=left"`
 ###### Does it displays the correct result at the left side?
 
-##### Try passing as arguments `"HELLO there HOW are YOU?!" thinkertoy --align=justify`
+##### Try passing as arguments `""HELLO there HOW are YOU?!" thinkertoy --align=justify"`
 ###### Does it displays the correct result justified?
 
-##### Try passing as arguments `"a -> A b -> B c -> C" shadow --align=right`
+##### Try passing as arguments `""a -> A b -> B c -> C" shadow --align=right"`
 ###### Does it displays the correct result at the right side?
 
-##### Try reducing the terminal window and run `abcd shadow --align=right`
-###### Does the representation adapt to the terminal size displaying the right result in the right side?
-
-##### Try reducing the terminal window and run `ola standard --align=center`
+##### Try reducing the terminal window and run `"abcd shadow --align=right"`
 ###### Does the representation adapt to the terminal size displaying the right result in the right side?
 
+##### Try reducing the terminal window and run `"ola standard --align=center"`
+###### Does the representation adapt to the terminal size displaying the right result in the center?
 
 ##### Try passing as arguments a random string with lower and upper case letters, and the align flag ("--align=") followed by a random alignment (left, right, center or justify).
 ###### Does it display the expected result?
@@ -55,7 +54,7 @@
 ###### +Is the output of the program well structured? Does any letter seems to be out of line?
 ###### +Is there a test file for this code?
 ###### +Are the tests checking each possible case?
-###### +Does the code obey the [good practices](https://github.com/01-edu/public/blob/master/subjects/good-practices.en.md)?
+###### +Does the code obey the [good practices](https://public.01-edu.org/subjects/good-practices.en)?
 
 #### Social
 
diff --git a/subjects/ascii-art/ascii-art-justify.en.md b/subjects/ascii-art/ascii-art-justify.en.md
index 9133f63d..c49604cc 100644
--- a/subjects/ascii-art/ascii-art-justify.en.md
+++ b/subjects/ascii-art/ascii-art-justify.en.md
@@ -2,7 +2,7 @@
 
 ### Objectives
 
-You must follow the same [instructions](https://github.com/01-edu/public/blob/master/subjects/ascii-art/ascii-art.en.md) as in the first subject but the representation should be formatted using a **flag** `--align=<type>`, in which `type` can be :
+You must follow the same [instructions](https://public.01-edu.org/subjects/ascii-art/ascii-art.en) as in the first subject but the representation should be formatted using a **flag** `--align=<type>`, in which `type` can be :
 
 - center
 - left
@@ -23,7 +23,7 @@ This project will help you learn about :
 ### Instructions
 
 - Your project must be written in **Go**.
-- The code must respect the [**good practices**](https://github.com/01-edu/public/blob/master/subjects/good-practices.en.md).
+- The code must respect the [**good practices**](https://public.01-edu.org/subjects/good-practices.en).
 - It is recommended that the code should present a **test file**.
 
 ### Usage
diff --git a/subjects/ascii-art/ascii-art-output.audit.en.md b/subjects/ascii-art/ascii-art-output.audit.en.md
index 5f0c900d..38e7c187 100644
--- a/subjects/ascii-art/ascii-art-output.audit.en.md
+++ b/subjects/ascii-art/ascii-art-output.audit.en.md
@@ -50,7 +50,7 @@ student$ cat test02.txt
 
 ```
 ###### Does it save the right output in the right file?
-##### Try passing as arguments `"32 -> #$%&@" shadow --output=test03.txt`
+##### Try passing as arguments `"432 -> #$%&@" shadow --output=test03.txt`
 ```
 student$ cat test03.txt
                                                                                                                   
@@ -78,7 +78,7 @@ _|_|_|_|_| _|
 
 ```
 ###### Does it save the right output in the right file?
-##### Try passing as arguments `"23 -> \"#$%@" thinkertoy --output=test05.txt`
+##### Try passing as arguments `"123 -> \"#$%@" thinkertoy --output=test05.txt`
 ```
 student$ cat test05.txt
                                     o o         | |               
@@ -141,7 +141,7 @@ student$ cat test07.txt
 ###### +Is the output of the program well structured? Does any letter seems to be out of line?
 ###### +Is there a test file for this code?
 ###### +Are the tests checking each possible case?
-###### +Does the code obey the [good practices](https://github.com/01-edu/public/blob/master/subjects/good-practices.en.md)?
+###### +Does the code obey the [good practices](https://public.01-edu.org/subjects/good-practices.en)?
 
 #### Social
 
diff --git a/subjects/ascii-art/ascii-art-output.en.md b/subjects/ascii-art/ascii-art-output.en.md
index 8dc80c2d..446de941 100644
--- a/subjects/ascii-art/ascii-art-output.en.md
+++ b/subjects/ascii-art/ascii-art-output.en.md
@@ -2,7 +2,7 @@
 
 ### Objectives
 
-- You must follow the same [instructions](https://github.com/01-edu/public/blob/master/subjects/ascii-art/ascii-art.en.md) as in the first subject but writing the result into a file.
+- You must follow the same [instructions](https://public.01-edu.org/subjects/ascii-art/ascii-art.en) as in the first subject but writing the result into a file.
 
 - The file must be named by using the flag `--output=<fileName.txt>`, in which `--output` is the flag and `<fileName.txt>` is the file name.
 
@@ -18,7 +18,7 @@ This project will help you learn about :
 ### Instructions
 
 - Your project must be written in **Go**.
-- The code must respect the [**good practices**](https://github.com/01-edu/public/blob/master/subjects/good-practices.en.md).
+- The code must respect the [**good practices**](https://public.01-edu.org/subjects/good-practices.en).
 - It is recommended that the code should present a **test file**.
 
 ### Usage
diff --git a/subjects/ascii-art/ascii-art-reverse-example.md b/subjects/ascii-art/ascii-art-reverse-example.md
index c2a54dd2..f2745836 100644
--- a/subjects/ascii-art/ascii-art-reverse-example.md
+++ b/subjects/ascii-art/ascii-art-reverse-example.md
@@ -5,14 +5,14 @@
 ### example00
 
 ```console
-  _    _          _   _                __          __                 _       _  
- | |  | |        | | | |               \ \        / /                | |     | | 
- | |__| |   ___  | | | |   ___          \ \  /\  / /    ___    _ __  | |   __| | 
- |  __  |  / _ \ | | | |  / _ \          \ \/  \/ /    / _ \  | '__| | |  / _` | 
- | |  | | |  __/ | | | | | (_) |          \  /\  /    | (_) | | |    | | | (_| | 
- |_|  |_|  \___| |_| |_|  \___/            \/  \/      \___/  |_|    |_|  \__,_| 
-                                                                                 
-                                                                                 
+ _    _          _   _                __          __                 _       _  
+| |  | |        | | | |               \ \        / /                | |     | | 
+| |__| |   ___  | | | |   ___          \ \  /\  / /    ___    _ __  | |   __| | 
+|  __  |  / _ \ | | | |  / _ \          \ \/  \/ /    / _ \  | '__| | |  / _` | 
+| |  | | |  __/ | | | | | (_) |          \  /\  /    | (_) | | |    | | | (_| | 
+|_|  |_|  \___| |_| |_|  \___/            \/  \/      \___/  |_|    |_|  \__,_| 
+                                                                                
+                                                                                
 
 ```
 
@@ -33,13 +33,13 @@
 ### example02
 
 ```console
-                             ___  
-   _  _             __      |  _| 
- _| || |_   ______  \ \     | |   
+   _  _             __       ___  
+ _| || |_   ______  \ \     |  _| 
 |_  __  _| |______|  \ \    | |   
  _| || |_   ______    \ \   | |   
-|_  __  _| |______|    \ \  | |_  
-  |_||_|                \_\ |___| 
+|_  __  _| |______|    \ \  | |   
+  |_||_|                \_\ | |_  
+                            |___| 
                                   
 
 ```
@@ -47,14 +47,14 @@
 ### example03
 
 ```console
-  __                            _     _       _                                                        __   
- / /                           | |   | |     (_)               __ _    ___     ____    _____   _  _    \ \  
-| |   ___    ___    _ __ ___   | |_  | |__    _   _ __ ___    / _` |  ( _ )   |___ \  |___ /  | || |    | | 
-| |  / __|  / _ \  | '_ ` _ \  | __| |  _ \  | | | '_ ` _ \  | (_| |  / _ \/\   __) |   |_ \  | || |_   | | 
-| |  \__ \ | (_) | | | | | | | \ |_  | | | | | | | | | | | |  \__, | | (_>  <  / __/   ___) | |__   _|  | | 
-| |  |___/  \___/  |_| |_| |_|  \__| |_| |_| |_| |_| |_| |_|   __/ |  \___/\/ |_____| |____/     |_|    | | 
- \_\                                                          |___/                                    /_/  
-                                                                                                            
+  __                            _     _       _                                                    __   
+ / /                           | |   | |     (_)           __ _    ___     ____    _____   _  _    \ \  
+| |   ___    ___    _ __ ___   | |_  | |__    _   _ __    / _` |  ( _ )   |___ \  |___ /  | || |    | | 
+| |  / __|  / _ \  | '_ ` _ \  | __| |  _ \  | | | '_ \  | (_| |  / _ \/\   __) |   |_ \  | || |_   | | 
+| |  \__ \ | (_) | | | | | | | \ |_  | | | | | | | | | |  \__, | | (_>  <  / __/   ___) | |__   _|  | | 
+| |  |___/  \___/  |_| |_| |_|  \__| |_| |_| |_| |_| |_|   __/ |  \___/\/ |_____| |____/     |_|    | | 
+ \_\                                                      |___/                                    /_/  
+                                                                                                        
 
 ```
 
@@ -89,14 +89,14 @@ __       _   _ _           _  _      _     _   __           _    __ __       _
 ### example06
 
 ```console
-           __          __     ___            
- _   _    / /  ______  \ \   |__ \     ____  
-(_) (_)  / /  |______|  \ \     ) |   / __ \ 
-        < <    ______    > >   / /   / / _` |
- _   _   \ \  |______|  / /   |_|   | | (_| |
-(_) ( )   \_\          /_/    (_)    \ \__,_|
-    |/                                \____/ 
-                                             
+           __          __     ___             
+ _   _    / /  ______  \ \   |__ \     ____   
+(_) (_)  / /  |______|  \ \     ) |   / __ \  
+        < <    ______    > >   / /   / / _` | 
+ _   _   \ \  |______|  / /   |_|   | | (_| | 
+(_) ( )   \_\          /_/    (_)    \ \__,_| 
+    |/                                \____/  
+                                              
 
 ```
 
diff --git a/subjects/ascii-art/ascii-art-reverse.audit.en.md b/subjects/ascii-art/ascii-art-reverse.audit.en.md
index f88df513..2a717a56 100644
--- a/subjects/ascii-art/ascii-art-reverse.audit.en.md
+++ b/subjects/ascii-art/ascii-art-reverse.audit.en.md
@@ -1,27 +1,27 @@
 #### Functional Project Questions
 
-##### Try passing to the reverse flag `"--reverse=example00.txt"` the [example 00](https://github.com/01-edu/public/blob/master/subjects/ascii-art/ascii-art-reverse-example.md).
+##### Try passing to the reverse flag `"--reverse=example00.txt"` the [example 00](https://public.01-edu.org/subjects/ascii-art/ascii-art-reverse-example).
 `Hello World`
 ###### Does it display the value above?
-##### Try passing to the reverse flag `"--reverse=example01.txt"` the [example 01](https://github.com/01-edu/public/blob/master/subjects/ascii-art/ascii-art-reverse-example.md).
+##### Try passing to the reverse flag `"--reverse=example01.txt"` the [example 01](https://public.01-edu.org/subjects/ascii-art/ascii-art-reverse-example).
 `123`
 ###### Does it display the value above?
-##### Try passing to the reverse flag `"--reverse=example02.txt"` the [example 02](https://github.com/01-edu/public/blob/master/subjects/ascii-art/ascii-art-reverse-example.md).
+##### Try passing to the reverse flag `"--reverse=example02.txt"` the [example 02](https://public.01-edu.org/subjects/ascii-art/ascii-art-reverse-example).
 `#=\[`
 ###### Does it display the value above?
-##### Try passing to the reverse flag `"--reverse=example03.txt"` the [example 03](https://github.com/01-edu/public/blob/master/subjects/ascii-art/ascii-art-reverse-example.md).
+##### Try passing to the reverse flag `"--reverse=example03.txt"` the [example 03](https://public.01-edu.org/subjects/ascii-art/ascii-art-reverse-example).
 `(somthing&234)`
 ###### Does it display the value above?
-##### Try passing to the reverse flag `"--reverse=example04.txt"` the [example 04](https://github.com/01-edu/public/blob/master/subjects/ascii-art/ascii-art-reverse-example.md).
+##### Try passing to the reverse flag `"--reverse=example04.txt"` the [example 04](https://public.01-edu.org/subjects/ascii-art/ascii-art-reverse-example).
 `abcdefghijklmnopqrstuvwxyz`
 ###### Does it display the value above?
-##### Try passing to the reverse flag `"--reverse=example05.txt"` the [example 05](https://github.com/01-edu/public/blob/master/subjects/ascii-art/ascii-art-reverse-example.md).
+##### Try passing to the reverse flag `"--reverse=example05.txt"` the [example 05](https://public.01-edu.org/subjects/ascii-art/ascii-art-reverse-example).
 `\!" #$%&'()*+,-./`
 ###### Does it display the value above?
-##### Try passing to the reverse flag `"--reverse=example06.txt"` the [example 06](https://github.com/01-edu/public/blob/master/subjects/ascii-art/ascii-art-reverse-example.md).
+##### Try passing to the reverse flag `"--reverse=example06.txt"` the [example 06](https://public.01-edu.org/subjects/ascii-art/ascii-art-reverse-example).
 `:;<=>?@`
 ###### Does it display the value above?
-##### Try passing to the reverse flag `"--reverse=example07.txt"` the [example 07](https://github.com/01-edu/public/blob/master/subjects/ascii-art/ascii-art-reverse-example.md).
+##### Try passing to the reverse flag `"--reverse=example07.txt"` the [example 07](https://public.01-edu.org/subjects/ascii-art/ascii-art-reverse-example).
 `ABCDEFGHIJKLMNOPQRSTUVWXYZ`
 ###### Does it display the value above?
 
@@ -40,7 +40,7 @@
 #### Basic
 
 ###### +Does the project runs quickly and effectively? (Favoring recursive, no unnecessary data requests, etc)
-###### +Does the code obey the [good practices](https://github.com/01-edu/public/blob/master/subjects/good-practices.en.md)?
+###### +Does the code obey the [good practices](https://public.01-edu.org/subjects/good-practices.en)?
 
 ###### +Is there a test file for this code?
 ###### +Are the tests checking each possible case?
diff --git a/subjects/ascii-art/ascii-art-reverse.en.md b/subjects/ascii-art/ascii-art-reverse.en.md
index 626a4454..f554ee08 100644
--- a/subjects/ascii-art/ascii-art-reverse.en.md
+++ b/subjects/ascii-art/ascii-art-reverse.en.md
@@ -2,7 +2,7 @@
 
 ### Objectives
 
-You must follow the same [instructions](https://github.com/01-edu/public/blob/master/subjects/ascii-art/ascii-art.en.md) as in the first subject.
+You must follow the same [instructions](https://public.01-edu.org/subjects/ascii-art/ascii-art.en) as in the first subject.
 
 - Ascii-reverse consists on reversing the process, converting the graphic representation into a text.
 - You will have to create a text file containing a graphic representation of a random `string`.
@@ -21,7 +21,7 @@ This project will help you learn about :
 ### Instructions
 
 - Your project must be written in **Go**.
-- The code must respect the [**good practices**](https://github.com/01-edu/public/blob/master/subjects/good-practices.en.md).
+- The code must respect the [**good practices**](https://public.01-edu.org/subjects/good-practices.en).
 - It is recommended that the code should present a **test file**.
 
 ### Usage
diff --git a/subjects/ascii-art/ascii-art.audit.en.md b/subjects/ascii-art/ascii-art.audit.en.md
index 0d9ad1b6..cb2d162c 100644
--- a/subjects/ascii-art/ascii-art.audit.en.md
+++ b/subjects/ascii-art/ascii-art.audit.en.md
@@ -106,38 +106,38 @@
 ###### Does it display the right graphical representation in ASCII as above?
 ##### Try passing `"1a\"#FdwHywR&/()="` as argument.
 ```
-             _ _     _  _     ______       _              _    _                      _____                  __   __ __            
- _          ( | )  _| || |_  |  ____|     | |            | |  | |                    |  __ \    ___         / /  / / \ \   ______  
-/ |   __ _   V V  |_  __  _| | |__      __| | __      __ | |__| |  _   _  __      __ | |__) |  ( _ )       / /  | |   | | |______| 
-| |  / _` |        _| || |_  |  __|    / _` | \ \ /\ / / |  __  | | | | | \ \ /\ / / |  _  /   / _ \/\    / /   | |   | |  ______  
-| | | (_| |       |_  __  _| | |      | (_| |  \ V  V /  | |  | | | |_| |  \ V  V /  | | \ \  | (_>  <   / /    | |   | | |______| 
-|_|  \__,_|         |_||_|   |_|       \__,_|   \_/\_/   |_|  |_|  \__, |   \_/\_/   |_|  \_\  \___/\/  /_/     | |   | |          
-                                                                   __/ /                                         \_\ /_/           
-                                                                  |___/                                                            
+             _ _     _  _     ______       _              _    _                      _____                 __   __ __            
+ _          ( | )  _| || |_  |  ____|     | |            | |  | |                    |  __ \    ___        / /  / / \ \   ______  
+/ |   __ _   V V  |_  __  _| | |__      __| | __      __ | |__| |  _   _  __      __ | |__) |  ( _ )      / /  | |   | | |______| 
+| |  / _` |        _| || |_  |  __|    / _` | \ \ /\ / / |  __  | | | | | \ \ /\ / / |  _  /   / _ \/\   / /   | |   | |  ______  
+| | | (_| |       |_  __  _| | |      | (_| |  \ V  V /  | |  | | | |_| |  \ V  V /  | | \ \  | (_>  <  / /    | |   | | |______| 
+|_|  \__,_|         |_||_|   |_|       \__,_|   \_/\_/   |_|  |_|  \__, |   \_/\_/   |_|  \_\  \___/\/ /_/     | |   | |          
+                                                                   __/ /                                        \_\ /_/           
+                                                                  |___/                                                           
 ```
 ###### Does it display the right graphical representation in ASCII as above?
 ##### Try passing `"{|}~"` as argument.
 ```
-   __  _  __     /\/|
-  / / | | \ \   |/\/ 
- | |  | |  | |       
-/ /   | |   \ \      
-\ \   | |   / /      
- | |  | |  | |       
-  \_\ | | /_/        
-      |_|            
+   __  _  __     /\/| 
+  / / | | \ \   |/\/  
+ | |  | |  | |        
+/ /   | |   \ \       
+\ \   | |   / /       
+ | |  | |  | |        
+  \_\ | | /_/         
+      |_|             
 ```
 ###### Does it display the right graphical representation in ASCII as above?
 ##### Try passing `"[\]^_ 'a"` as argument.
 ```
- ___  __       ___   /\                  _         
-|  _| \ \     |_  | |/\|                ( )        
-| |    \ \      | |                      \|  __ _  
-| |     \ \     | |                         / _` | 
-| |      \ \    | |                        | (_| | 
-| |_      \_\  _| |                         \__,_| 
-|___|         |___|       ______                   
-                         |______|                  
+ ___  __       ___   /\                  _          
+|  _| \ \     |_  | |/\|                ( )         
+| |    \ \      | |                     |/    __ _  
+| |     \ \     | |                          / _` | 
+| |      \ \    | |                         | (_| | 
+| |_      \_\  _| |                          \__,_| 
+|___|         |___|       ______                    
+                         |______|                   
 ```
 ###### Does it display the right graphical representation in ASCII as above?
 ##### Try passing `"RGB"` as argument.
@@ -154,29 +154,29 @@
 ###### Does it display the right graphical representation in ASCII as above?
 ##### Try passing `":;<=>?@"` as argument.
 ```
-           __          __     ___            
- _   _    / /  ______  \ \   |__ \     ____  
-(_) (_)  / /  |______|  \ \     ) |   / __ \ 
-        < <    ______    > >   / /   / / _` |
- _   _   \ \  |______|  / /   |_|   | | (_| |
-(_) ( )   \_\          /_/    (_)    \ \__,_|
-    |/                                \____/ 
-                                             
+           __          __     ___             
+ _   _    / /  ______  \ \   |__ \     ____   
+(_) (_)  / /  |______|  \ \     ) |   / __ \  
+        < <    ______    > >   / /   / / _` | 
+ _   _   \ \  |______|  / /   |_|   | | (_| | 
+(_) ( )   \_\          /_/    (_)    \ \__,_| 
+    |/                                \____/  
+                                              
 ```
 ###### Does it display the right graphical representation in ASCII as above?
 ##### Try passing `"\!\" #$%&'()*+,-./"` as argument.
 ```
-__       _   _ _           _  _      _     _   __           _    __ __       _                                    __ 
-\ \     | | ( | )        _| || |_   | |   (_) / /   ___    ( )  / / \ \   /\| |/\     _                          / / 
- \ \    | |  V V        |_  __  _| / __)     / /   ( _ )   |/  | |   | |  \ ` ' /   _| |_       ______          / /  
-  \ \   | |              _| || |_  \__ \    / /    / _ \/\     | |   | | |_     _| |_   _|     |______|        / /   
-   \ \  |_|             |_  __  _| (   /   / / _  | (_>  <     | |   | |  / , . \    |_|    _            _    / /    
-    \_\ (_)               |_||_|    |_|   /_/ (_)  \___/\/     | |   | |  \/|_|\/          ( )          (_)  /_/     
-                                                                \_\ /_/                    |/                        
-                                                                                                                     
+__       _   _ _           _  _      _    _   __           _    __ __       _                                   __ 
+\ \     | | ( | )        _| || |_   | |  (_) / /   ___    ( )  / / \ \   /\| |/\     _                         / / 
+ \ \    | |  V V        |_  __  _| / __)    / /   ( _ )   |/  | |   | |  \ ` ' /   _| |_       ______         / /  
+  \ \   | |              _| || |_  \__ \   / /    / _ \/\     | |   | | |_     _| |_   _|     |______|       / /   
+   \ \  |_|             |_  __  _| (   /  / / _  | (_>  <     | |   | |  / , . \    |_|    _            _   / /    
+    \_\ (_)               |_||_|    |_|  /_/ (_)  \___/\/     | |   | |  \/|_|\/          ( )          (_) /_/     
+                                                               \_\ /_/                    |/                       
+                                                                                                                   
 ```
 ###### Does it display the right graphical representation in ASCII as above?
-##### Try passing `"ABCDEFGHIJKLMNOQPRSTUVWXYZ"` as argument.
+##### Try passing `"ABCDEFGHIJKLMNOPQRSTUVWXYZ"` as argument.
 ```
             ____     _____   _____    ______   ______    _____   _    _   _____        _   _  __  _        __  __   _   _    ____    _____     ____    _____     _____   _______   _    _  __      __ __          __ __   __ __     __  ______ 
     /\     |  _ \   / ____| |  __ \  |  ____| |  ____|  / ____| | |  | | |_   _|      | | | |/ / | |      |  \/  | | \ | |  / __ \  |  __ \   / __ \  |  __ \   / ____| |__   __| | |  | | \ \    / / \ \        / / \ \ / / \ \   / / |___  / 
@@ -186,7 +186,6 @@ __       _   _ _           _  _      _     _   __           _    __ __       _
 /_/    \_\ |____/   \_____| |_____/  |______| |_|       \_____| |_|  |_| |_____|  \____/  |_|\_\ |______| |_|  |_| |_| \_|  \____/  |_|       \___\_\ |_|  \_\ |_____/     |_|     \____/      \/         \/  \/     /_/ \_\    |_|    /_____| 
                                                                                                                                                                                                                                                
                                                                                                                                                                                                                                                
-
 ```
 ###### Does it display the right graphical representation in ASCII as above?
 ##### Try passing `"abcdefghijklmnopqrstuvwxyz"` as argument.
@@ -217,7 +216,7 @@ __       _   _ _           _  _      _     _   __           _    __ __       _
 #### Basic
 
 ###### +Does the project runs quickly and effectively? (Favoring recursive, no unnecessary data requests, etc)
-###### +Does the code obey the [good practices](https://github.com/01-edu/public/blob/master/subjects/good-practices.en.md)?
+###### +Does the code obey the [good practices](https://public.01-edu.org/subjects/good-practices.en)?
 
 ###### +Is there a test file for this code?
 ###### +Are the tests checking each possible case?
diff --git a/subjects/ascii-art/ascii-art.en.md b/subjects/ascii-art/ascii-art.en.md
index 0a238357..41302ae4 100644
--- a/subjects/ascii-art/ascii-art.en.md
+++ b/subjects/ascii-art/ascii-art.en.md
@@ -19,7 +19,7 @@ This project will help you learn about :
 ### Instructions
 
 - Your project must be written in **Go**.
-- The code must respect the [**good practices**](https://github.com/01-edu/public/blob/master/subjects/good-practices.en.md).
+- The code must respect the [**good practices**](https://public.01-edu.org/subjects/good-practices.en).
 - It is recommended that the code should present a **test file**.
 
 - It will be given some [**banner**](https://github.com/01-edu/public/blob/master/subjects/ascii-art) files with a specific graphical template representation of ASCII. The files are formatted in a way that it is not necessary to change them.
diff --git a/subjects/ascii-art/shadow.txt b/subjects/ascii-art/shadow.txt
index b6efd7ea..d7cdb43a 100644
--- a/subjects/ascii-art/shadow.txt
+++ b/subjects/ascii-art/shadow.txt
@@ -521,14 +521,14 @@ _|      _|
            
            
 
-            
-_|_|_|_|_|  
-      _|    
-    _|      
-  _|        
-_|_|_|_|_|  
-            
-            
+           
+_|_|_|_|_| 
+      _|   
+    _|     
+  _|       
+_|_|_|_|_| 
+           
+           
 
 _|_| 
 _|   
@@ -809,14 +809,14 @@ _|    _|
       _| 
   _|_|   
 
-          
-          
-_|_|_|_|  
-    _|    
-  _|      
-_|_|_|_|  
-          
-          
+         
+         
+_|_|_|_| 
+    _|   
+  _|     
+_|_|_|_| 
+         
+         
 
     _| 
   _|   
diff --git a/subjects/ascii-art/standard.txt b/subjects/ascii-art/standard.txt
index a1f2f87c..8150e248 100644
--- a/subjects/ascii-art/standard.txt
+++ b/subjects/ascii-art/standard.txt
@@ -44,14 +44,14 @@
       
       
 
-  _   __ 
- (_) / / 
-    / /  
-   / /   
-  / / _  
- /_/ (_) 
-         
-         
+ _   __ 
+(_) / / 
+   / /  
+  / /   
+ / / _  
+/_/ (_) 
+        
+        
 
          
   ___    
@@ -134,14 +134,14 @@ __
     
     
 
-      __ 
-     / / 
-    / /  
-   / /   
-  / /    
- /_/     
-         
-         
+     __ 
+    / / 
+   / /  
+  / /   
+ / /    
+/_/     
+        
+        
 
         
   ___   
@@ -287,14 +287,14 @@ __
        
        
 
-         
-   ____  
-  / __ \ 
- / / _` |
-| | (_| |
- \ \__,_|
-  \____/ 
-         
+          
+   ____   
+  / __ \  
+ / / _` | 
+| | (_| | 
+ \ \__,_| 
+  \____/  
+          
 
            
     /\     
@@ -575,14 +575,14 @@ __
  ______  
 |______| 
 
- _ 
-( )
- \|
-   
-   
-   
-   
-   
+ _  
+( ) 
+ \| 
+    
+    
+    
+    
+    
 
         
         
@@ -845,11 +845,11 @@ __
 /_/   
       
 
- /\/|
-|/\/ 
-     
-     
-     
-     
-     
-     
+ /\/| 
+|/\/  
+      
+      
+      
+      
+      
+      
diff --git a/subjects/atoibase.en.md b/subjects/atoibase.en.md
index 50f7769b..8674ec30 100644
--- a/subjects/atoibase.en.md
+++ b/subjects/atoibase.en.md
@@ -4,13 +4,15 @@
 
 Write a function that takes a `string` number and its `string` base in parameters and returns its conversion as an `int`.
 
-If the base or the `string` number is not valid it returns `0`:
+If the base is not valid it returns `0`.
 
 Validity rules for a base :
 
--   A base must contain at least 2 characters.
--   Each character of a base must be unique.
--   A base should not contain `+` or `-` characters.
+- A base must contain at least 2 characters.
+- Each character of a base must be unique.
+- A base should not contain `+` or `-` characters.
+
+String number must contain only elements that are in base.
 
 Only valid `string` numbers will be tested.
 
diff --git a/subjects/groupie-trackers/groupie-trackers-filters.audit.en.md b/subjects/groupie-trackers/groupie-trackers-filters.audit.en.md
index 5b00df8c..82fca9ab 100644
--- a/subjects/groupie-trackers/groupie-trackers-filters.audit.en.md
+++ b/subjects/groupie-trackers/groupie-trackers-filters.audit.en.md
@@ -36,7 +36,7 @@
 
 #### Basic
 
-###### +Does the code obey the [good practices](https://github.com/01-edu/public/blob/master/subjects/good-practices.en.md)?
+###### +Does the code obey the [good practices](https://public.01-edu.org/subjects/good-practices.en)?
 ###### +Are the instructions in the website clear?
 
 #### Social
diff --git a/subjects/groupie-trackers/groupie-trackers-filters.en.md b/subjects/groupie-trackers/groupie-trackers-filters.en.md
index 33704e71..4fa23fa0 100644
--- a/subjects/groupie-trackers/groupie-trackers-filters.en.md
+++ b/subjects/groupie-trackers/groupie-trackers-filters.en.md
@@ -2,7 +2,7 @@
 
 ### Objectives
 
-You must follow the same [principles](https://github.com/01-edu/public/blob/master/subjects/groupie-trackers/groupie-trackers.en.md) as the first subject.
+You must follow the same [principles](https://public.01-edu.org/subjects/groupie-trackers/groupie-trackers.en) as the first subject.
 
 - Groupie Trackers Filters consists on letting the user filter the artists/bands that will be shown.
 
@@ -31,5 +31,5 @@ This project will help you learn about:
 
 - The backend must be written in **Go**.
 - You must handle website errors.
-- The code must respect the [good practices](https://github.com/01-edu/public/blob/master/subjects/good-practices.en.md)
+- The code must respect the [good practices](https://public.01-edu.org/subjects/good-practices.en)
 - It is recommended that the code should present a **test file**.
diff --git a/subjects/groupie-trackers/groupie-trackers-geolocation.audit.en.md b/subjects/groupie-trackers/groupie-trackers-geolocation.audit.en.md
index c9b91edd..b4ea91a3 100644
--- a/subjects/groupie-trackers/groupie-trackers-geolocation.audit.en.md
+++ b/subjects/groupie-trackers/groupie-trackers-geolocation.audit.en.md
@@ -6,7 +6,7 @@
 ```
 los angeles usa,
 nagoya japan,
-osaka japon,
+osaka japan,
 penrose new zealand,
 saitama japan,
 dunedin new zealand,
@@ -18,7 +18,7 @@ georgia usa
 ```
 dusseldorf germany,
 manchester uk,
-new yourk usa,
+new york usa,
 aarhus denmark
 ```
 ###### Are the markers displayed in the locations above?
@@ -29,10 +29,10 @@ napoca germany,
 quebec canada,
 del mar usa,
 mexico city mexico,
-las vagas usa,
+las vegas usa,
 lisbon portugal,
 monterrey mexico,
-new yourk usa,
+new york usa,
 rio de janeiro brazil,
 riyadh saudi arabia,
 california usa,
@@ -59,14 +59,14 @@ philadelphia usa,
 uniondale usa,
 columbia usa,
 hershey usa,
-pittburgh usa,
+pittsburgh usa,
 rosemont usa,
-washigdon usa,
+washington usa,
 toronto usa,
 grand rapids usa,
 indianapolis usa,
 kansas city usa,
-montreals usa,
+montreal usa,
 omaha usa,
 st louis usa,
 newark usa
@@ -78,7 +78,7 @@ newark usa
 landgraaf netherlands,
 los angeles california usa,
 rio de janeiro brazil,
-athens grece,
+athens greece,
 boston massachusetts,
 dana point california usa,
 florence italia,
@@ -88,11 +88,11 @@ gulf shores alabama usa
 
 #### General
 
-###### +Does the markers connect in an historical order, using lines to see the path?
+###### +Does the markers connect in a historical order, using lines to see the path?
 
 #### Basic
 
-###### +Does the code obey the [good practices](https://github.com/01-edu/public/blob/master/subjects/good-practices.en.md)?
+###### +Does the code obey the [good practices](https://public.01-edu.org/subjects/good-practices.en)?
 ###### +Are the instructions in the website clear?
 ###### +Does the project run using an API?
 
diff --git a/subjects/groupie-trackers/groupie-trackers-geolocation.en.md b/subjects/groupie-trackers/groupie-trackers-geolocation.en.md
index 12532e43..2c4495fa 100644
--- a/subjects/groupie-trackers/groupie-trackers-geolocation.en.md
+++ b/subjects/groupie-trackers/groupie-trackers-geolocation.en.md
@@ -2,13 +2,13 @@
 
 ### Objectives
 
-You must follow the same [principles](https://github.com/01-edu/public/blob/master/subjects/groupie-trackers/groupie-trackers.en.md) as the first subject.
+You must follow the same [principles](https://public.01-edu.org/subjects/groupie-trackers/groupie-trackers.en) as the first subject.
 
 - Groupie Trackers Geolocation consists on mapping the different concerts locations of a certain artist/band given by the Client.
 
-- You must use a process of converting addresses (ex: Germany Mainz) into geographic coordinates (ex: 49,59380 8,15052) which you must use to place markers for the concerts locations of a certain artist/band on a map
+- You must use a process of converting addresses (ex: Germany Mainz) into geographic coordinates (ex: 49,59380 8,15052) which you must use to place markers for the concerts locations of a certain artist/band on a map.
 
-- You are free to use the [Map API](https://rapidapi.com/blog/top-map-apis/) you found more appropriate
+- You are free to use the [Map API](https://rapidapi.com/blog/top-map-apis/) you found more appropriate.
 
 This project will help you learn about :
 
@@ -23,7 +23,7 @@ This project will help you learn about :
 
 - The backend must be written in **Go**
 - You must handle website errors
-- The code must respect the [good practices](https://github.com/01-edu/public/blob/master/subjects/good-practices.en.md)
+- The code must respect the [good practices](https://public.01-edu.org/subjects/good-practices.en)
 - It is recommended that the code should present a **test file**
 
 ### Usage
diff --git a/subjects/groupie-trackers/groupie-trackers-search-bar.audit.en.md b/subjects/groupie-trackers/groupie-trackers-search-bar.audit.en.md
index 1c5ecbc4..5fc6be7c 100644
--- a/subjects/groupie-trackers/groupie-trackers-search-bar.audit.en.md
+++ b/subjects/groupie-trackers/groupie-trackers-search-bar.audit.en.md
@@ -32,7 +32,7 @@
 
 #### Basic
 
-###### +Does the code obey the [good practices](https://github.com/01-edu/public/blob/master/subjects/good-practices.en.md)?
+###### +Does the code obey the [good practices](https://public.01-edu.org/subjects/good-practices.en)?
 ###### +Are the instructions in the website clear?
 ###### +Does the project run using an API?
 
diff --git a/subjects/groupie-trackers/groupie-trackers-search-bar.en.md b/subjects/groupie-trackers/groupie-trackers-search-bar.en.md
index f08f9d52..d3692dde 100644
--- a/subjects/groupie-trackers/groupie-trackers-search-bar.en.md
+++ b/subjects/groupie-trackers/groupie-trackers-search-bar.en.md
@@ -2,7 +2,7 @@
 
 ### Objectives
 
-You must follow the same [principles](https://github.com/01-edu/public/blob/master/subjects/groupie-trackers/groupie-trackers.en.md) as the first subject.
+You must follow the same [principles](https://public.01-edu.org/subjects/groupie-trackers/groupie-trackers.en) as the first subject.
 
 Groupie-trackers-search-bar consists of creating a functional program that searches, inside your website, for a specific input text.
 
@@ -27,4 +27,4 @@ This project will help you learn about :
 ### Instructions
 
 - The program must be written in **Go**.
-- The code must respect the [**good practices**](https://github.com/01-edu/public/blob/master/subjects/good-practices.en.md).
+- The code must respect the [**good practices**](https://public.01-edu.org/subjects/good-practices.en).
diff --git a/subjects/groupie-trackers/groupie-trackers.audit.en.md b/subjects/groupie-trackers/groupie-trackers.audit.en.md
index b5bb243e..0e93727c 100644
--- a/subjects/groupie-trackers/groupie-trackers.audit.en.md
+++ b/subjects/groupie-trackers/groupie-trackers.audit.en.md
@@ -65,7 +65,9 @@
 
 #### Basic
 
-###### +Does the code obey the [good practices](https://github.com/01-edu/public/blob/master/subjects/good-practices.en.md)?
+###### +Does the project runs quickly and effectively? (Favoring recursive, no unnecessary data requests, etc)
+###### +Does the code obey the [good practices](https://public.01-edu.org/subjects/good-practices.en)?
+###### +Is there a test file for this code?
 
 #### Social
 
diff --git a/subjects/groupie-trackers/groupie-trackers.en.md b/subjects/groupie-trackers/groupie-trackers.en.md
index 1601ec05..66856330 100644
--- a/subjects/groupie-trackers/groupie-trackers.en.md
+++ b/subjects/groupie-trackers/groupie-trackers.en.md
@@ -33,7 +33,7 @@ This project will help you learn about :
 ### Instructions
 
 - The backend must be written in **Go**.
-- The code must respect the [**good practices**](https://github.com/01-edu/public/blob/master/subjects/good-practices.en.md).
+- The code must respect the [**good practices**](https://public.01-edu.org/subjects/good-practices.en).
 - It is recommended that the code should present a **test file**.
 
 ### Usage
diff --git a/subjects/my-ls-1/my-ls-1.audit.en.md b/subjects/my-ls-1/my-ls-1.audit.en.md
new file mode 100644
index 00000000..fa8139df
--- /dev/null
+++ b/subjects/my-ls-1/my-ls-1.audit.en.md
@@ -0,0 +1,62 @@
+#### Functional
+
+##### Run both my-ls-1 and the system command `ls` with no arguments.
+###### Does it displays the same files and/or folders in the same order?
+
+##### Run both my-ls-1 and the system command `ls` with the arguments: `<file name>`.
+###### Does it displays the same file?
+
+##### Run both my-ls-1 and the system command `ls` with the arguments: `<directory name>`.
+###### Does it displays the same files and/or folders in the same order?
+
+##### Run both my-ls-1 and the system command `ls` with the flag: `-l`.
+###### Does it displays the same files and/or folders with the same display?
+
+##### Run both my-ls-1 and the system command `ls` with the arguments: `-l <file name>`.
+###### Does it displays the same file with the same display?
+
+##### Run both my-ls-1 and the system command `ls` with the arguments: `-l <directory name>`.
+###### Does it displays the same files and/or folders with the same display?
+
+##### Run both my-ls-1 and the system command `ls` with the flag: `-l /usr/bin`.
+###### Does it displays the same files and/or folders with the same display? Be aware of symbolic links.
+
+##### Run both my-ls-1 and the system command `ls` with the flag: `-R`, in a directory with folders in it.
+###### Does it displays the same files and/or folders?
+
+##### Run both my-ls-1 and the system command `ls` with the flag: `-a`.
+###### Does it displays the same files and/or folders in the same order?
+
+##### Run both my-ls-1 and the system command `ls` with the flag: `-r`.
+###### Does it displays the same files and/or folders in the same order?
+
+##### Run both my-ls-1 and the system command `ls` with the flag: `-t`.
+###### Does it displays the same files and/or folders in the same order?
+
+##### Run both my-ls-1 and the system command `ls` with the flag: `-la`.
+###### Does it displays the same files and/or folders in the same order?
+
+##### Run both my-ls-1 and the system command `ls` with the arguments: `-l -t <directory name>`.
+###### Does it displays the same files and/or folders in the same order?
+
+##### Run both my-ls-1 and the system command `ls` with the arguments: `-lRr <directory name>`, in which the directory chosen contains folders.
+###### Does it displays the same files and/or folders in the same order?
+
+#### General
+
+###### +Does the program runs with colors as in the ls command?
+###### +Does the program has other flags except for the mandatory ones?
+
+##### Try running the program with `-R ~` and with the command time before the program name (ex: "time ./my-ls-1 -R ~").
+###### +Is the real time less than 1,5 seconds?
+
+#### Basic
+
+###### +Does the code obey the [good practices](https://public.01-edu.org/subjects/good-practices.en)?
+###### +Is there a test file for this code?
+###### +Are the tests checking each possible case?
+
+#### Social
+
+###### +Did you learn anything from this project?
+###### +Would you recommend/nominate this program as an example for the rest of the school?
diff --git a/subjects/my-ls-1/my-ls-1.en.md b/subjects/my-ls-1/my-ls-1.en.md
new file mode 100644
index 00000000..34b45b6b
--- /dev/null
+++ b/subjects/my-ls-1/my-ls-1.en.md
@@ -0,0 +1,44 @@
+## my-ls-1
+
+### Objectives
+
+- my-ls-1 consists on creating your own `ls` command.
+
+- The `ls` command shows you the files and folders of the directory specified after the command. By exclusion of this directory, it shows the files and folders of the present directory.
+
+- The behavior of your `ls` must be identical to the original `ls` command with the following variations :
+  - You must incorporate in your project at least the following flags of the `ls` command :
+    - `-l`
+    - `-R`
+    - `-a`
+    - `-r`
+    - `-t`
+  - Note that you can use various flags, in various ways, just like in `ls`.
+  - When it comes to the `ls -l` display, it must be identical to the system command.
+  - Other flags displays are up to you.
+
+This project will help you learn about :
+
+- Unix system
+- Ways to receive data.
+- Ways to output data.
+- Manipulation of strings.
+- Manipulation of structures.
+
+### Instructions
+
+- Your project must be written in **Go**.
+- The code must respect the [**good practices**](https://public.01-edu.org/subjects/good-practices.en).
+- It is recommended that the code should present a **test file**.
+
+### Hint
+
+- We strongly recommend that you account for the implications of the option `-R` from the very beginning of your code.
+
+- The order that files and folders appear must be taken in consideration.
+
+- We suggest that you consult the `ls` command manual.
+
+### Usage
+
+You can see how the `ls` command works, by using it on your terminal.
diff --git a/subjects/net-cat/net-cat.audit.en.md b/subjects/net-cat/net-cat.audit.en.md
new file mode 100644
index 00000000..0be8de0c
--- /dev/null
+++ b/subjects/net-cat/net-cat.audit.en.md
@@ -0,0 +1,55 @@
+#### Functional
+
+##### Try running `"./net-cat -p 8080"`.
+###### Is the server listening for connections?
+
+##### Try opening 3 terminals, run on the first terminal the command `"./net-cat -p <port>"` and on the second and third terminal run the command `"./net-cat <host ip> <port>"`.
+###### Does both clients connect to the server with success?
+
+##### Try opening 4 terminals, run on the first terminal the command `"./net-cat -u -p <port>"` and on the second, third and fourth terminal run the command `"./net-cat -u <host ip> <port>"`.
+###### Does all clients connect to the server with [UDP](https://www.privateinternetaccess.com/blog/2018/12/tcp-vs-udp-understanding-the-difference/) connection?
+
+##### Try creating a server and 2 Clients.
+###### Do all Clients receive a message informing that the Client joined the chat?
+
+##### Try creating a server and 2 Clients and send a message using the first Client.
+###### Does the second Client receive the message?
+
+##### Try creating a server and 1 Client and send some messages using this Client. Then create a new Client.
+###### Can the new Client see all the messages?
+
+##### Try creating a server and 3 Clients and send a message using the second Client.
+###### Does all the Clients(first, second and third) received the same message?
+
+##### Try creating a server and use 2 or 3 different computers and create for each computer one Client.
+###### Did the server/Clients connected with success?
+
+##### Try creating a server and 4 Clients and disconnect one of the Clients.
+###### Does the rest of the Clients stay connected?
+
+##### Try creating a server and 3 Clients and disconnect one of the Clients.
+###### Does the rest of the Clients receive a message notifying that the Client left?
+
+##### Try creating a server and 3 Clients. Then send messages between the Clients.
+###### Are the messages identified by the name of each Client and the time that the messages was sent?
+
+###### Is the connections between server and Clients well established?
+
+#### General
+
+###### +Can the Clients change their names?
+###### +Is the chat group informed if a Client changes his name?
+###### +Does the server produce logs about Clients activities?
+###### +Is there more NetCat flags implemented?
+
+#### Basic
+
+###### +Does the project runs quickly and effectively? (Favoring recursive, no unnecessary data requests, etc)
+###### +Does the code obey the [good practices](https://public.01-edu.org/subjects/good-practices.en)?
+###### +Is there a test file for this code?
+
+#### Social
+
+###### +Did you learn anything from this project?
+###### +Can it be open-sourced / be used for other sources?
+###### +Would you recommend/nominate this program as an example for the rest of the school?
diff --git a/subjects/net-cat/net-cat.en.md b/subjects/net-cat/net-cat.en.md
new file mode 100644
index 00000000..0540771e
--- /dev/null
+++ b/subjects/net-cat/net-cat.en.md
@@ -0,0 +1,121 @@
+## net-cat
+
+### Objectives
+
+This project consists on recreating the **NetCat in a Server-Client Architecture** that can run in a server mode on a specified port listening for incoming connections, and it can be used in client mode, trying to connect on a specified port and transmitting information to the server.
+
+- NetCat, `nc` the system command, is a computer network utility for reading from and writing to network connections using TCP or UDP. It is used for anything involving TCP, UDP, or UNIX-domain sockets, it is able to open TCP connections, send UDP packages, listen on arbitrary TCP and UDP ports...
+
+- To see more information about NetCat inspect the manual `man nc`.
+
+Here is a simple example of connection and transmission between Server-Client by creating a TCP socket between server and client.
+
+- Open two terminals, one for the server and the other for Client.
+  - Use the following commands for the server side :
+
+    ```console
+    stuednt$ mawk -W interactive '$0="\033[1;32mServer: \033[0m"$0' | nc -l -p <port>
+    Client: Hello it's the CLIENT talking
+    hello there
+
+    ```
+
+  - Use the following commands for the client side :
+
+    ```console
+    stuednt$ mawk -W interactive '$0="\033[1;32mClient: \033[0m"$0' | nc <host ip> <port>
+    Hello it's the CLIENT talking
+    Server: Hello there
+
+    ```
+
+  - To see the host IP use the command `ifconfig` on the host machine.
+
+Your project must work in a similar way that NetCat works, in other words you must create a group chat. The project must present :
+
+- TCP or UDP connection between server and multiple clients (relation of 1 to many), the type of connection must be established by using a flag, just like `nc`, by default it uses TCP connection, if you want to use UDP connection present the flag `-u`.
+- Each Client must have an user name.
+- Clients must be able to send messages to the chat.
+- Messages sent, must be identified by the time that was sent and the user name of who sent the message.
+- If a Client joins the chat, all the messages sent to the chat must be uploaded to the new Client.
+- If a Client connects to the server, the rest of the Clients must be informed by the server that the Client joined the group.
+- If a Client exits the chat, the rest of the Clients must be informed by the server that the Client left.
+- All Clients must receive the messages sent by other Clients.
+- If a Client leaves the chat, the rest of the Clients must not disconnect.
+
+This project will help you learn about :
+
+- Manipulation of structures.
+- [Net-Cat](https://linuxize.com/post/netcat-nc-command-with-examples/)
+- [TCP/UDP](https://www.privateinternetaccess.com/blog/2018/12/tcp-vs-udp-understanding-the-difference/)
+  - TCP/UDP connection
+  - TCP/UDP socket
+- [Channels](https://tour.golang.org/concurrency/2)
+- [Goroutines](https://tour.golang.org/concurrency/1)
+- IP and [ports](https://en.wikipedia.org/wiki/List_of_TCP_and_UDP_port_numbers)
+
+### Hints
+
+- Try to find out more about the flags `-u`, `-p` and `-l`.
+
+### Instructions
+
+- Your project must be written in **Go**.
+- Your project must use TCP or UDP.
+- The code must respect the [**good practices**](https://public.01-edu.org/subjects/good-practices.en).
+- It is recommended that the code should present a **test file** for the server connection and the client connection.
+- You have to be able to handle the errors from server side and client side.
+
+### Usage
+
+Here is a simple example of a group chat :
+
+- Server side :
+
+```console
+student$ ./net-cat -p 8080
+listening on port 8080....
+
+```
+
+- Two Clients running at the same time
+
+- Client 2 :
+
+```console
+stuednt$ ./net-cat 192.168.1.123 8080
+wellcome, you are connected
+
+enter user name : client2
+your name is client2
+
+client2 joined the chat...
+client1 joined the chat...
+
+hello
+client2 at 18:12- hello
+client1 at 18:13- hello man
+how are you?
+client2 at 18:15- how are you?
+client1 left the chat...
+
+```
+
+- Client 1 :
+
+```console
+stuednt$ ./net-cat 192.168.1.123 8080
+wellcome, you are connected
+
+enter user name : client1
+your name is client1
+
+client2 joined the chat...
+client1 joined the chat...
+
+client2 at 18:12- hello
+hello man
+client1 at 18:13- hello man
+client2 at 18:15- how are you?
+^C
+```
diff --git a/subjects/push-swap/push-swap.audit.en.md b/subjects/push-swap/push-swap.audit.en.md
index 6de923b1..cff2ccdd 100644
--- a/subjects/push-swap/push-swap.audit.en.md
+++ b/subjects/push-swap/push-swap.audit.en.md
@@ -62,7 +62,7 @@ OK
 
 #### Basic
 
-###### +Does the code obey the [good practices](https://github.com/01-edu/public/blob/master/subjects/good-practices.en.md)?
+###### +Does the code obey the [good practices](https://public.01-edu.org/subjects/good-practices.en)?
 ###### +Is there a test file for this code?
 ###### +Are the tests checking each possible case?
 
diff --git a/subjects/push-swap/push-swap.en.md b/subjects/push-swap/push-swap.en.md
index 0808c61a..04302ea3 100644
--- a/subjects/push-swap/push-swap.en.md
+++ b/subjects/push-swap/push-swap.en.md
@@ -149,7 +149,7 @@ student$
 ### Instructions
 
 - Your project must be written in **Go**.
-- The code must respect the [**good practices**](https://github.com/01-edu/public/good-practices.en.md).
+- The code must respect the [**good practices**](https://public.01-edu.org/subjects/good-practices.en).
 - It is recommended that the code should present a **test file**.
 - The first executable file must be named **checker** and the second **push_swap**.
 - You have to be able to handle the errors.
diff --git a/subjects/tetris-optimizer/tetris-optimizer.audit.en.md b/subjects/tetris-optimizer/tetris-optimizer.audit.en.md
index b0b10caa..d092c59d 100644
--- a/subjects/tetris-optimizer/tetris-optimizer.audit.en.md
+++ b/subjects/tetris-optimizer/tetris-optimizer.audit.en.md
@@ -1,32 +1,32 @@
 #### Functional
 
-##### Try bad example 00 (https://github.com/01-edu/public/blob/master/subjects/tetris-optimizer/badexample00.md).
+##### Try bad example 00 (https://public.01-edu.org/subjects/tetris-optimizer/badexample00).
 `ERROR`
 ###### Does the program prints the value above?
-##### Try bad example 01 (https://github.com/01-edu/public/blob/master/subjects/tetris-optimizer/badexample01.md).
+##### Try bad example 01 (https://public.01-edu.org/subjects/tetris-optimizer/badexample01).
 `ERROR`
 ###### Does the program prints the value above?
-##### Try bad example 02 (https://github.com/01-edu/public/blob/master/subjects/tetris-optimizer/badexample02.md).
+##### Try bad example 02 (https://public.01-edu.org/subjects/tetris-optimizer/badexample02).
 `ERROR`
 ###### Does the program prints the value above?
-##### Try bad example 03 (https://github.com/01-edu/public/blob/master/subjects/tetris-optimizer/badexample03.md).
+##### Try bad example 03 (https://public.01-edu.org/subjects/tetris-optimizer/badexample03).
 `ERROR`
 ###### Does the program prints the value above?
-##### Try bad example 04 (https://github.com/01-edu/public/blob/master/subjects/tetris-optimizer/badexample04.md).
+##### Try bad example 04 (https://public.01-edu.org/subjects/tetris-optimizer/badexample04).
 `ERROR`
 ###### Does the program prints the value above?
-##### Try bad format (https://github.com/01-edu/public/blob/master/subjects/tetris-optimizer/badformat.md).
+##### Try bad format (https://public.01-edu.org/subjects/tetris-optimizer/badformat).
 `ERROR`
 ###### Does the program prints the value above?
-##### Try good example 00 (https://github.com/01-edu/public/blob/master/subjects/tetris-optimizer/goodexample00.md).
+##### Try good example 00 (https://public.01-edu.org/subjects/tetris-optimizer/goodexample00).
 ###### Does the result contain 0 empty spaces (0 '.')?
-##### Try good example 01 (https://github.com/01-edu/public/blob/master/subjects/tetris-optimizer/goodexample01.md).
+##### Try good example 01 (https://public.01-edu.org/subjects/tetris-optimizer/goodexample01).
 ###### Does the result contain 9 empty spaces (9 '.')?
-##### Try good example 02 (https://github.com/01-edu/public/blob/master/subjects/tetris-optimizer/goodexample02.md).
+##### Try good example 02 (https://public.01-edu.org/subjects/tetris-optimizer/goodexample02).
 ###### Does the result contain 4 empty spaces (4 '.')?
-##### Try good example 03 (https://github.com/01-edu/public/blob/master/subjects/tetris-optimizer/goodexample03.md).
+##### Try good example 03 (https://public.01-edu.org/subjects/tetris-optimizer/goodexample03).
 ###### Does the result contain 5 empty spaces (5 '.')?
-##### Try hard example (https://github.com/01-edu/public/blob/master/subjects/tetris-optimizer/hardexam.md).
+##### Try hard example (https://public.01-edu.org/subjects/tetris-optimizer/hardexam).
 ###### Does the result contain 1 empty spaces (1 '.')?
 ###### Are all of the Tetrominos contained in the test file, present in the output?
 ###### Different characters correspond to different Tetrominos?
@@ -37,7 +37,7 @@
 ###### +Does the project runs quickly and effectively (Favoring of recursive, no unnecessary data requests, etc.)?
 ###### +Is there a test file for this code?
 ###### +Are the tests checking each possible case?
-###### +Does the code obey the [good practices](https://github.com/01-edu/public/blob/master/subjects/good-practices.en.md)?
+###### +Does the code obey the [good practices](https://public.01-edu.org/subjects/good-practices.en)?
 
 #### Social
 
diff --git a/subjects/tetris-optimizer/tetris-optimizer.en.md b/subjects/tetris-optimizer/tetris-optimizer.en.md
index e7cc4ced..a2ea4b36 100644
--- a/subjects/tetris-optimizer/tetris-optimizer.en.md
+++ b/subjects/tetris-optimizer/tetris-optimizer.en.md
@@ -8,12 +8,14 @@ Develop a program that receives only one argument, a path to a text file which w
 
 The program must :
 
--   Be written in Go
--   Compile successfully
--   Assemble all of the tetrominoes in order to create the smallest square possible
--   Identify each tetromino in the solution by printing them with uppercase latin letters (`A` for the first one, `B` for the second, etc)
--   Expect at least one tetromino in the text file
--   In case of bad format on the tetrominoes or bad file format it should print `ERROR`
+- Compile successfully
+- Assemble all of the tetrominoes in order to create the smallest square possible
+- Identify each tetromino in the solution by printing them with uppercase latin letters (`A` for the first one, `B` for the second, etc)
+- Expect at least one tetromino in the text file
+- In case of bad format on the tetrominoes or bad file format it should print `ERROR`
+- The project must be written in **Go**.
+- The code must respect the [**good practices**](https://public.01-edu.org/subjects/good-practices.en).
+- It is recommended that the code should present a **test file**.
 
 #### Example of a text File