diff --git a/subjects/fillit.en.md b/subjects/fillit.en.md
deleted file mode 100644
index 7506f74b9..000000000
--- a/subjects/fillit.en.md
+++ /dev/null
@@ -1,92 +0,0 @@
-## tetrisoptimizer
-
-### Objectives
-
-Develop a program that receives only one argument, a path to a text file which will contain a list of [tetrominoes](https://en.wikipedia.org/wiki/Tetromino) to assemble them in order to create the smallest square possible.
-
-### Instructions
-
-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 assigning different letters to different tetrominoes
--   Expect at least 2 tetrominoes in the text file
--   In case of bad format on the tetrominoes or bad file format it should print `ERROR`
-
-#### Example of a text File
-
-```console
-#...
-#...
-#...
-#...
-
-....
-....
-..##
-..##
-```
-
--   If it isn't possible to form a complete square, the program should leave spaces between the tetrominoes. For example:
-
-```console
-ABB.
-ABB.
-A...
-A...
-```
-
-## Usage
-
-```
-student@ubuntu:~/tetrisoptimizer$ cat -e sample.txt
-...#$
-...#$
-...#$
-...#$
-$
-....$
-....$
-....$
-####$
-$
-.###$
-...#$
-....$
-....$
-$
-....$
-..##$
-.##.$
-....$
-$
-....$
-.##.$
-.##.$
-....$
-$
-....$
-....$
-##..$
-.##.$
-$
-##..$
-.#..$
-.#..$
-....$
-$
-....$
-###.$
-.#..$
-....$
-student@ubuntu:~/tetrisoptimizer$ ./tetrisoptimizer sample.txt | cat -e
-ABBBB.$
-ACCCEE$
-AFFCEE$
-A.FFGG$
-HHHDDG$
-.HDD.G$
-student@ubuntu:~/tetrisoptimizer$
-```
diff --git a/subjects/tetrisoptimizer.en.md b/subjects/tetrisoptimizer.en.md
index 55c7c25a7..7506f74b9 100644
--- a/subjects/tetrisoptimizer.en.md
+++ b/subjects/tetrisoptimizer.en.md
@@ -1,20 +1,19 @@
-## tetrisoptimizre
+## tetrisoptimizer
 
 ### Objectives
 
-Develop a program that receives only one argument, a text file which will contain a list of [Tetrominoes](https://en.wikipedia.org/wiki/Tetromino) to assemble them in order to create the smallest square possible.
+Develop a program that receives only one argument, a path to a text file which will contain a list of [tetrominoes](https://en.wikipedia.org/wiki/Tetromino) to assemble them in order to create the smallest square possible.
 
 ### Instructions
 
-- Your program will be tested using our solution, you don't need to submit your text files
-
 The program must :
 
-- Expect at least 2 Tetrominoes in the text file
-- Identify each Tetromino in the solution, by assigning different letters to different Tetrominoes
-- Assemble all of the Tetrominoes in order to create the smallest square possible
-- Print the solution where Tetrominoes are placed on their most upper left position, if there are more than one solution it
-- In case of bad format on the Tetrominoes or bad file format it should print `ERROR`
+-   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 assigning different letters to different tetrominoes
+-   Expect at least 2 tetrominoes in the text file
+-   In case of bad format on the tetrominoes or bad file format it should print `ERROR`
 
 #### Example of a text File
 
@@ -30,7 +29,7 @@ The program must :
 ..##
 ```
 
-- If it isn't possible to form a complete square, the program should leave spaces between the Tetrominoes. For example:
+-   If it isn't possible to form a complete square, the program should leave spaces between the tetrominoes. For example:
 
 ```console
 ABB.
@@ -42,7 +41,7 @@ A...
 ## Usage
 
 ```
-student@ubuntu:~/tetrisoptimizre$ cat -e sample.txt
+student@ubuntu:~/tetrisoptimizer$ cat -e sample.txt
 ...#$
 ...#$
 ...#$
@@ -82,12 +81,12 @@ $
 ###.$
 .#..$
 ....$
-student@ubuntu:~/tetrisoptimizre$ ./tetrisoptimizre sample.txt | cat -e
+student@ubuntu:~/tetrisoptimizer$ ./tetrisoptimizer sample.txt | cat -e
 ABBBB.$
 ACCCEE$
 AFFCEE$
 A.FFGG$
 HHHDDG$
 .HDD.G$
-student@ubuntu:~/tetrisoptimizre$
+student@ubuntu:~/tetrisoptimizer$
 ```