diff --git a/subjects/atoiprog.en.md b/subjects/atoiprog.en.md
index a786abfb..22117840 100644
--- a/subjects/atoiprog.en.md
+++ b/subjects/atoiprog.en.md
@@ -1,6 +1,6 @@
 ## atoiprog
 
-##**WARNING! VERY IMPORTANT!**
+## **WARNING! VERY IMPORTANT!**
 
 For this exercise a function will be tested **with the exam own main**. However the student **still needs** to submit a structured program:
 
diff --git a/subjects/splitprog.en.md b/subjects/splitprog.en.md
index 3b62bc72..b814051b 100644
--- a/subjects/splitprog.en.md
+++ b/subjects/splitprog.en.md
@@ -1,24 +1,53 @@
-## splitprog
+## split
+
+## **WARNING! VERY IMPORTANT!**
+
+For this exercise a function will be tested **with the exam own main**. However the student **still needs** to submit a structured program:
+
+This means that:
+
+- The package needs to be named `package main`.
+- The submitted code needs one declared function main(```func main()```) even if empty.
+- The function main declared needs to **also pass** the `Restrictions Checker`(illegal functions tester). It is advised for the student to just empty the function main after its own testings are done.
+- Every other rules are obviously the same than for a `program`.
 
 ### Instructions
 
-Write a program which separates the words of a `string`, which puts them in a `string` array and which then prints it to standard output.
+Write a function that separates the words of a `string` and puts them in a `string` array.
 
-The program receives two parameters:
+The separators are the characters of the `charset string` given in parameter.
 
--   The first is the `string`
--   The second is the separator
+### Expected function
+
+```go
+func Split(str, charset string) []string {
+
+}
+```
+
+### Usage
+
+Here is a possible [program](TODO-LINK) to test your function :
+
+```go
+package main
+
+import (
+	"fmt"
+	piscine ".."
+)
+
+func main() {
+	str := "HelloHAhowHAareHAyou?"
+	fmt.Println(piscine.Split(str, "HA"))
+}
+```
 
-### Usage :
+And its output :
 
 ```console
-student@ubuntu:~/piscine-go/splitprog$ go build
-student@ubuntu:~/piscine-go/splitprog$ ./splitprog "HelloHAhowHAareHAyou?" HA | cat -e
-[Hello how are you?]$
-student@ubuntu:~/piscine-go/splitprog$ ./splitprog "Hello,how,are,you?" ","
+student@ubuntu:~/piscine-go/test$ go build
+student@ubuntu:~/piscine-go/test$ ./test
 [Hello how are you?]
-student@ubuntu:~/piscine-go/splitprog$ ./splitprog "HelloHAhowHAareHAyou?"
-student@ubuntu:~/piscine-go/splitprog$
-student@ubuntu:~/piscine-go/splitprog$ ./splitprog
-student@ubuntu:~/piscine-go/splitprog$
+student@ubuntu:~/piscine-go/test$
 ```