diff --git a/subjects/atoibaseprog.en.md b/subjects/atoibaseprog.en.md
deleted file mode 100644
index 0719f94b..00000000
--- a/subjects/atoibaseprog.en.md
+++ /dev/null
@@ -1,56 +0,0 @@
-## atoibaseprog
-
-### Instructions
-
-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`
-
-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.
-
-Only valid `string` numbers will be tested.
-
-The function **does not have** to manage negative numbers.
-
-### Expected function
-
-```go
-func AtoiBase(s string, base string) int {
-
-}
-```
-
-### Usage
-
-Here is a possible program to test your function :
-
-```go
-package main
-
-import "fmt"
-
-func main() {
-	fmt.Println(AtoiBase("125", "0123456789"))
-	fmt.Println(AtoiBase("1111101", "01"))
-	fmt.Println(AtoiBase("7D", "0123456789ABCDEF"))
-	fmt.Println(AtoiBase("uoi", "choumi"))
-	fmt.Println(AtoiBase("bbbbbab", "-ab"))
-}
-```
-
-And its output :
-
-```console
-student@ubuntu:~/test$ go build
-student@ubuntu:~/test$ ./test
-125
-125
-125
-125
-0
-student@ubuntu:~/test$
-```
diff --git a/subjects/atoiprog.en.md b/subjects/atoiprog.en.md
deleted file mode 100644
index 08277d95..00000000
--- a/subjects/atoiprog.en.md
+++ /dev/null
@@ -1,74 +0,0 @@
-## atoiprog
-
-### Instructions
-
-- Write a function that simulates the behaviour of the `Atoi` function in Go. `Atoi` transforms a number represented as a `string` in a number represented as an `int`.
-
-- `Atoi` returns `0` if the `string` is not considered as a valid number. For this exercise **non-valid `string` chains will be tested**. Some will contain non-digits characters.
-
-- For this exercise the handling of the signs + or - **does have** to be taken into account.
-
-- This function will **only** have to return the `int`. For this exercise the `error` result of atoi is not required.
-
-### Expected function
-
-```go
-func Atoi(s string) int {
-
-}
-```
-
-### Usage
-
-Here is a possible program to test your function :
-
-```go
-package main
-
-import "fmt"
-
-func main() {
-	s := "12345"
-	s2 := "0000000012345"
-	s3 := "012 345"
-	s4 := "Hello World!"
-	s5 := "+1234"
-	s6 := "-1234"
-	s7 := "++1234"
-	s8 := "--1234"
-
-	n := Atoi(s)
-	n2 := Atoi(s2)
-	n3 := Atoi(s3)
-	n4 := Atoi(s4)
-	n5 := Atoi(s5)
-	n6 := Atoi(s6)
-	n7 := Atoi(s7)
-	n8 := Atoi(s8)
-
-	fmt.Println(n)
-	fmt.Println(n2)
-	fmt.Println(n3)
-	fmt.Println(n4)
-	fmt.Println(n5)
-	fmt.Println(n6)
-	fmt.Println(n7)
-	fmt.Println(n8)
-}
-```
-
-And its output :
-
-```console
-student@ubuntu:~/[[ROOT]]/test$ go build
-student@ubuntu:~/[[ROOT]]/test$ ./test
-12345
-12345
-0
-0
-1234
--1234
-0
-0
-student@ubuntu:~/[[ROOT]]/test$
-```
diff --git a/subjects/capitalizeprog.en.md b/subjects/capitalizeprog.en.md
deleted file mode 100644
index 232b53fc..00000000
--- a/subjects/capitalizeprog.en.md
+++ /dev/null
@@ -1,23 +0,0 @@
-## capitalizeprog
-
-### Instructions
-
-Write a program that capitalizes the first letter of each word **and** lowercases the rest of each word of a `string`.
-
-- A word is a sequence of **alphanumerical** characters.
-
-- If there is more than one argument the program should print `Too many arguments`.
-
-- If there is no arguments given the program should print nothing.
-
-### Usage :
-
-```console
-student@ubuntu:~/capitalizeprog$ go build
-student@ubuntu:~/capitalizeprog$ ./capitalizeprog "Hello! How are you? How+are+things+4you?" | cat -e
-Hello! How Are You? How+Are+Things+4you?$
-student@ubuntu:~/capitalizeprog$ ./capitalizeprog Hello! How are you? | cat -e
-Too many arguments$
-student@ubuntu:~/capitalizeprog$ ./capitalizeprog
-student@ubuntu:~/capitalizeprog$
-```
diff --git a/subjects/compareprog.en.md b/subjects/compareprog.en.md
deleted file mode 100644
index c57d1da9..00000000
--- a/subjects/compareprog.en.md
+++ /dev/null
@@ -1,24 +0,0 @@
-## compareprog
-
-### Instructions
-
-Write a program that behaves like the `Compare` function from the `Go` package `strings`.
-
-This program prints a number after comparing two `string` lexicographically.
-
-### Usage
-
-```console
-student@ubuntu:~/compareprog$ go build
-student@ubuntu:~/compareprog$ ./compareprog a b | cat -e
--1$
-student@ubuntu:~/compareprog$ ./compareprog a a | cat -e
-0$
-student@ubuntu:~/compareprog$ ./compareprog b a | cat -e
-1$
-student@ubuntu:~/compareprog$ ./compareprog b a d | cat -e
-$
-student@ubuntu:~/compareprog$ ./compareprog | cat -e
-$
-student@ubuntu:~/compareprog$
-```
diff --git a/subjects/firstruneprog.en.md b/subjects/firstruneprog.en.md
deleted file mode 100644
index 96fb3ca6..00000000
--- a/subjects/firstruneprog.en.md
+++ /dev/null
@@ -1,13 +0,0 @@
-## firstruneprog
-
-### Instructions
-
-Write a function that returns the first `rune` of a `string`.
-
-### Expected function
-
-```go
-func FirstRune(s string) rune {
-
-}
-```
diff --git a/subjects/foreachprog.en.md b/subjects/foreachprog.en.md
deleted file mode 100644
index 60254263..00000000
--- a/subjects/foreachprog.en.md
+++ /dev/null
@@ -1,39 +0,0 @@
-## foreachprog
-
-### Instructions
-
-Write a function `ForEach` that, for an `int` slice, applies a function on each elements of that slice.
-
-### Expected function
-
-```go
-func ForEach(f func(int), a []int) {
-
-}
-```
-
-### Usage
-
-Here is a possible program to test your function :
-
-```go
-package main
-
-func main() {
-	a := []int{1, 2, 3, 4, 5, 6}
-	ForEach(PrintNbr, a)
-}
-
-func PrintNbr(int) {
-
-}
-```
-
-And its output :
-
-```console
-student@ubuntu:~/test$ go build
-student@ubuntu:~/test$ ./test
-123456
-student@ubuntu:~/test$
-```
diff --git a/subjects/itoabaseprog.en.md b/subjects/itoabaseprog.en.md
deleted file mode 100644
index 17ee139e..00000000
--- a/subjects/itoabaseprog.en.md
+++ /dev/null
@@ -1,26 +0,0 @@
-## itoabase
-
-### Instructions
-
-Write a function that:
-
-- converts an `int` value to a `string` using the specified base in the argument
-- and that returns this `string`
-
-The base is expressed as an `int`, from 2 to 16. The characters comprising
-the base are the digits from 0 to 9, followed by uppercase letters from A to F.
-
-For example, the base `4` would be the equivalent of "0123" and the base `16` would be the equivalent of "0123456789ABCDEF".
-
-If the value is negative, the resulting `string` has to be preceded with a
-minus sign `-`.
-
-Only valid inputs will be tested.
-
-### Expected function
-
-```go
-func ItoaBase(value, base int) string {
-
-}
-```
diff --git a/subjects/itoaprog.en.md b/subjects/itoaprog.en.md
deleted file mode 100644
index 96d6ad47..00000000
--- a/subjects/itoaprog.en.md
+++ /dev/null
@@ -1,15 +0,0 @@
-## itoaprog
-
-### Instructions
-
-- Write a function that simulates the behaviour of the `Itoa` function in Go. `Itoa` transforms a number represented as an `int` in a number represented as a `string`.
-
-- For this exercise the handling of the signs + or - **does have** to be taken into account.
-
-## Expected function
-
-```go
-func Itoa(n int) string {
-
-}
-```
diff --git a/subjects/lastruneprog.en.md b/subjects/lastruneprog.en.md
deleted file mode 100644
index ab0c2f7b..00000000
--- a/subjects/lastruneprog.en.md
+++ /dev/null
@@ -1,13 +0,0 @@
-## lastruneprog
-
-### Instructions
-
-Write a function that returns the last `rune` of a `string`.
-
-### Expected function
-
-```go
-func LastRune(s string) rune {
-
-}
-```
diff --git a/subjects/listremoveifprog.en.md b/subjects/listremoveifprog.en.md
deleted file mode 100644
index 692db5ff..00000000
--- a/subjects/listremoveifprog.en.md
+++ /dev/null
@@ -1,23 +0,0 @@
-## listremoveifprog
-
-### Instructions
-
-Write a function `ListRemoveIf` that removes all elements that have a `Data` field equal to the `data_ref` in the argument of the function.
-
-### Expected function and structure
-
-```go
-type NodeL struct {
-	Data interface{}
-	Next *NodeL
-}
-
-type List struct {
-	Head *NodeL
-	Tail *NodeL
-}
-
-func ListRemoveIf(l *List, data_ref interface{}) {
-
-}
-```
diff --git a/subjects/listsizeprog.en.md b/subjects/listsizeprog.en.md
deleted file mode 100644
index 3b18a45a..00000000
--- a/subjects/listsizeprog.en.md
+++ /dev/null
@@ -1,23 +0,0 @@
-## listsizeprog
-
-### Instructions
-
-Write a function `ListSize` that returns the number of elements in a linked list `l`.
-
-### Expected function and structure
-
-```go
-type NodeL struct {
-	Data interface{}
-	Next *NodeL
-}
-
-type List struct {
-	Head *NodeL
-	Tail *NodeL
-}
-
-func ListSize(l *List) int {
-
-}
-```
diff --git a/subjects/maxprog.en.md b/subjects/maxprog.en.md
deleted file mode 100644
index 77561af8..00000000
--- a/subjects/maxprog.en.md
+++ /dev/null
@@ -1,38 +0,0 @@
-## maxprog
-
-### Instructions
-
-Write a function, `Max`, that returns the maximum value in a slice of integers.
-
-### Expected function
-
-```go
-func Max(a []int) int {
-
-}
-```
-
-### Usage
-
-Here is a possible program to test your function :
-
-```go
-package main
-
-import "fmt"
-
-func main() {
-	arrInt := []int{23, 123, 1, 11, 55, 93}
-	max := Max(arrInt)
-	fmt.Println(max
-}
-```
-
-And its output :
-
-```console
-student@ubuntu:~/test$ go build
-student@ubuntu:~/test$ ./test
-123
-student@ubuntu:~/test$
-```
diff --git a/subjects/nruneprog.en.md b/subjects/nruneprog.en.md
deleted file mode 100644
index 50053431..00000000
--- a/subjects/nruneprog.en.md
+++ /dev/null
@@ -1,46 +0,0 @@
-## nruneprog
-
-### Instructions
-
-Write a function that returns the nth `rune` of a `string`.
-
-- In case of impossibilities, the function returns `0`.
-
-### Expected function
-
-```go
-func NRune(s string, n int) rune {
-
-}
-```
-
-### Usage
-
-Here is a possible program to test your function :
-
-```go
-package main
-
-import (
-	"github.com/01-edu/z01"
-	piscine ".."
-)
-
-func main() {
-	z01.PrintRune(piscine.NRune("Hello!", 3))
-	z01.PrintRune(piscine.NRune("Salut!", 2))
-	z01.PrintRune(piscine.NRune("Bye!", -1))
-	z01.PrintRune(piscine.NRune("Bye!", 5))
-	z01.PrintRune(piscine.NRune("Ola!", 4))
-	z01.PrintRune('\n')
-}
-```
-
-And its output :
-
-```console
-student@ubuntu:~/[[ROOT]]/test$ go build
-student@ubuntu:~/[[ROOT]]/test$ ./test
-la!
-student@ubuntu:~/[[ROOT]]/test$
-```
diff --git a/subjects/printcombprog.en.md b/subjects/printcombprog.en.md
deleted file mode 100644
index 0867cb64..00000000
--- a/subjects/printcombprog.en.md
+++ /dev/null
@@ -1,22 +0,0 @@
-## printcombprog
-
-### Instructions
-
-Write a program that prints in ascending order on a single line all unique combinations of three different digits so that the first digit is lower than the second and the second is lower than the third.
-
-These combinations are separated by a comma and a space.
-
-### Usage
-
-Here is an **incomplete** output :
-
-```console
-student@ubuntu:~/[[ROOT]]/printcombprog$ go build
-student@ubuntu:~/[[ROOT]]/printcombprog$ ./printcombprog | cat -e
-012, 013, 014, 015, 016, 017, 018, 019, 023, ..., 689, 789$
-student@ubuntu:~/[[ROOT]]/printcombprog$
-```
-
-`000` or `999` are not valid combinations because the digits are not different.
-
-`987` should not be shown because the first digit is not less than the second.
diff --git a/subjects/printdigitsprog.en.md b/subjects/printdigitsprog.en.md
deleted file mode 100644
index ef2b48dc..00000000
--- a/subjects/printdigitsprog.en.md
+++ /dev/null
@@ -1,16 +0,0 @@
-## printdigitsprog
-
-### Instructions
-
-Write a program that prints the decimal digits in ascending order (from `0` to `9`) on a single line.
-
-A line is a sequence of characters preceding the [end of line](https://en.wikipedia.org/wiki/Newline) character (`'\n'`).
-
-### Usage
-
-```console
-student@ubuntu:~/printdigitsprog$ go build
-student@ubuntu:~/printdigitsprog$ ./main
-0123456789
-student@ubuntu:~/printdigitsprog$
-```
diff --git a/subjects/printstrprog.en.md b/subjects/printstrprog.en.md
deleted file mode 100644
index addf0f42..00000000
--- a/subjects/printstrprog.en.md
+++ /dev/null
@@ -1,17 +0,0 @@
-## printstrprog
-
-### Instructions
-
-- Write a program that prints one by one the characters of a `string` passed as an argument of the program.
-
-### Expected output :
-
-```console
-student@ubuntu:~/[[ROOT]]/printstrprog$ go build
-student@ubuntu:~/[[ROOT]]/printstrprog$ ./printstrprog "Hello World!" | cat -e
-Hello World!$
-student@ubuntu:~/[[ROOT]]/printstrprog$ ./printstrprog
-student@ubuntu:~/[[ROOT]]/printstrprog$
-student@ubuntu:~/[[ROOT]]/printstrprog$ ./printstrprog "Hello" "World"
-student@ubuntu:~/[[ROOT]]/printstrprog$
-```
diff --git a/subjects/rot14prog.en.md b/subjects/rot14prog.en.md
deleted file mode 100644
index 28ac2c09..00000000
--- a/subjects/rot14prog.en.md
+++ /dev/null
@@ -1,16 +0,0 @@
-## rot14
-
-### Instructions
-
-Write a program that prints the `string` passed as argument, transformed into a `rot14 string`.
-
-### Usage
-
-```console
-student@ubuntu:~/rot14prog$ go build
-student@ubuntu:~/rot14prog$ ./rot14prog "Hello How are You" | cat -e
-Vszzc Vck ofs Mci$
-student@ubuntu:~/rot14prog$ ./rot14prog Hello How are You
-student@ubuntu:~/rot14prog$ ./rot14prog
-student@ubuntu:~/rot14prog$
-```
diff --git a/subjects/sortwordarrprog.en.md b/subjects/sortwordarrprog.en.md
deleted file mode 100644
index f742666c..00000000
--- a/subjects/sortwordarrprog.en.md
+++ /dev/null
@@ -1,38 +0,0 @@
-## sortwordarrprog
-
-### Instructions
-
-Write a function `SortWordArr` that sorts by ASCII (in ascending order) a `string` slice.
-
-### Expected function
-
-```go
-func SortWordArr(a []string) {
-
-}
-```
-
-### Usage
-
-Here is a possible program to test your function :
-
-```go
-package main
-
-import "fmt"
-
-func main() {
-	result := []string{"a", "A", "1", "b", "B", "2", "c", "C", "3"}
-	SortWordArr(result)
-	fmt.Println(result)
-}
-```
-
-And its output :
-
-```console
-student@ubuntu:~/test$ go build
-student@ubuntu:~/test$ ./test
-[1 2 3 A B C a b c]
-student@ubuntu:~/test$
-```
diff --git a/subjects/splitprog.en.md b/subjects/splitprog.en.md
deleted file mode 100644
index 700a683b..00000000
--- a/subjects/splitprog.en.md
+++ /dev/null
@@ -1,42 +0,0 @@
-## splitprog
-
-### Instructions
-
-Write a function that separates the words of a `string` and puts them in a `string` slice.
-
-The separators are the characters of the separator string given in parameter.
-
-### Expected function
-
-```go
-func Split(s, sep string) []string {
-
-}
-```
-
-### Usage
-
-Here is a possible program to test your function :
-
-```go
-package main
-
-import (
-	"fmt"
-	piscine ".."
-)
-
-func main() {
-	s := "HelloHAhowHAareHAyou?"
-	fmt.Printf("%#v\n", piscine.Split(s, "HA"))
-}
-```
-
-And its output :
-
-```console
-student@ubuntu:~/[[ROOT]]/test$ go build
-student@ubuntu:~/[[ROOT]]/test$ ./test
-[]string{"Hello", "how", "are", "you?"}
-student@ubuntu:~/[[ROOT]]/test$
-```
diff --git a/subjects/strlenprog.en.md b/subjects/strlenprog.en.md
deleted file mode 100644
index 272ddc7d..00000000
--- a/subjects/strlenprog.en.md
+++ /dev/null
@@ -1,38 +0,0 @@
-## strlenprog
-
-### Instructions
-
-- Write a function that counts the `runes` of a `string` and that returns that count.
-
-### Expected function
-
-```go
-func StrLen(s string) int {
-
-}
-```
-
-### Usage
-
-Here is a possible program to test your function :
-
-```go
-package main
-
-import "fmt"
-
-func main() {
-	s := "Hello World!"
-	nb := StrLen(s)
-	fmt.Println(nb)
-}
-```
-
-And its output :
-
-```console
-student@ubuntu:~/[[ROOT]]/test$ go build
-student@ubuntu:~/[[ROOT]]/test$ ./test
-12
-student@ubuntu:~/[[ROOT]]/test$
-```
diff --git a/subjects/strrevprog.en.md b/subjects/strrevprog.en.md
deleted file mode 100644
index c6f6574e..00000000
--- a/subjects/strrevprog.en.md
+++ /dev/null
@@ -1,15 +0,0 @@
-## strrevprog
-
-### Instructions
-
-- Write a program that reverses a `string` and prints it in the standard output.
-
-### Expected output :
-
-```console
-student@ubuntu:~/[[ROOT]]/strrevprog$ go build
-student@ubuntu:~/[[ROOT]]/strrevprog$ ./strrevprog "Hello World!" | cat -e
-!dlroW olleH$
-student@ubuntu:~/[[ROOT]]/strrevprog$ ./strrevprog
-student@ubuntu:~/[[ROOT]]/strrevprog$
-```
diff --git a/subjects/swapprog.en.md b/subjects/swapprog.en.md
deleted file mode 100644
index 9b5bf4ba..00000000
--- a/subjects/swapprog.en.md
+++ /dev/null
@@ -1,13 +0,0 @@
-## swapprog
-
-### Instructions
-
-- Write a function that swaps the contents of two **pointers to an int** (`*int`).
-
-### Expected function
-
-```go
-func Swap(a *int, b *int) {
-
-}
-```