diff --git a/subjects/raid1a.en.md b/subjects/raid1a.en.md
new file mode 100644
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--- /dev/null
+++ b/subjects/raid1a.en.md
@@ -0,0 +1,121 @@
+## raid1a
+
+### Instructions
+
+Write a function `Raid1a` that prints a **valid** square of width `x` and of height `y`.
+
+The function must draw the squares as in the examples.
+
+### Expected function
+
+```go
+func Raid1a(x,y int) {
+
+}
+```
+
+### Usage
+
+Here is are possible programs to test your function :
+
+Program #1
+
+```go
+package main
+
+import (
+	"fmt"
+	student "./student"
+)
+
+func main() {
+	student.Raid1a(5,3)
+}
+```
+
+And its output :
+
+```console
+student@ubuntu:~/student/test$ go build
+student@ubuntu:~/student/test$ ./test
+o---o
+|   |
+o---o
+student@ubuntu:~/student/test$
+```
+
+Program #2
+
+```go
+package main
+
+import (
+	"fmt"
+	student "./student"
+)
+
+func main() {
+	student.Raid1a(5,1)
+}
+```
+
+And its output :
+
+```console
+student@ubuntu:~/student/test$ go build
+student@ubuntu:~/student/test$ ./test
+o---o
+student@ubuntu:~/student/test$
+```
+
+Program #3
+
+```go
+package main
+
+import (
+	"fmt"
+	student "./student"
+)
+
+func main() {
+	student.Raid1a(1,1)
+}
+```
+
+And its output :
+
+```console
+student@ubuntu:~/student/test$ go build
+student@ubuntu:~/student/test$ ./test
+o
+student@ubuntu:~/student/test$
+```
+
+Program #4
+
+```go
+package main
+
+import (
+	"fmt"
+	student "./student"
+)
+
+func main() {
+	student.Raid1a(5,3)
+}
+```
+
+And its output :
+
+```console
+student@ubuntu:~/student/test$ go build
+student@ubuntu:~/student/test$ ./test
+o
+|
+|
+|
+o
+student@ubuntu:~/student/test$
+```
diff --git a/subjects/raid1b.en.md b/subjects/raid1b.en.md
new file mode 100644
index 000000000..c9041073f
--- /dev/null
+++ b/subjects/raid1b.en.md
@@ -0,0 +1,121 @@
+## raid1b
+
+### Instructions
+
+Write a function `Raid1b` that prints a **valid** square of width `x` and of height `y`.
+
+The function must draw the squares as in the examples.
+
+### Expected function
+
+```go
+func Raid1b(x,y int) {
+
+}
+```
+
+### Usage
+
+Here is are possible programs to test your function :
+
+Program #1
+
+```go
+package main
+
+import (
+	"fmt"
+	student "./student"
+)
+
+func main() {
+	student.Raid1b(5,3)
+}
+```
+
+And its output :
+
+```console
+student@ubuntu:~/student/test$ go build
+student@ubuntu:~/student/test$ ./test
+/***\
+*   *
+\***/
+student@ubuntu:~/student/test$
+```
+
+Program #2
+
+```go
+package main
+
+import (
+	"fmt"
+	student "./student"
+)
+
+func main() {
+	student.Raid1b(5,1)
+}
+```
+
+And its output :
+
+```console
+student@ubuntu:~/student/test$ go build
+student@ubuntu:~/student/test$ ./test
+/***\
+student@ubuntu:~/student/test$
+```
+
+Program #3
+
+```go
+package main
+
+import (
+	"fmt"
+	student "./student"
+)
+
+func main() {
+	student.Raid1b(1,1)
+}
+```
+
+And its output :
+
+```console
+student@ubuntu:~/student/test$ go build
+student@ubuntu:~/student/test$ ./test
+/
+student@ubuntu:~/student/test$
+```
+
+Program #4
+
+```go
+package main
+
+import (
+	"fmt"
+	student "./student"
+)
+
+func main() {
+	student.Raid1b(1,5)
+}
+```
+
+And its output :
+
+```console
+student@ubuntu:~/student/test$ go build
+student@ubuntu:~/student/test$ ./test
+/
+*
+*
+*
+\
+student@ubuntu:~/student/test$
+```
diff --git a/subjects/raid1c.en.md b/subjects/raid1c.en.md
new file mode 100644
index 000000000..0a7bb1a64
--- /dev/null
+++ b/subjects/raid1c.en.md
@@ -0,0 +1,121 @@
+## raid1c
+
+### Instructions
+
+Write a function `Raid1c` that prints a **valid** square of width `x` and of height `y`.
+
+The function must draw the squares as in the examples.
+
+### Expected function
+
+```go
+func Raid1c(x,y int) {
+
+}
+```
+
+### Usage
+
+Here is are possible programs to test your function :
+
+Program #1
+
+```go
+package main
+
+import (
+	"fmt"
+	student "./student"
+)
+
+func main() {
+	student.Raid1c(5,3)
+}
+```
+
+And its output :
+
+```console
+student@ubuntu:~/student/test$ go build
+student@ubuntu:~/student/test$ ./test
+ABBBA
+B   B
+CBBBC
+student@ubuntu:~/student/test$
+```
+
+Program #2
+
+```go
+package main
+
+import (
+	"fmt"
+	student "./student"
+)
+
+func main() {
+	student.Raid1c(5,1)
+}
+```
+
+And its output :
+
+```console
+student@ubuntu:~/student/test$ go build
+student@ubuntu:~/student/test$ ./test
+ABBBA
+student@ubuntu:~/student/test$
+```
+
+Program #3
+
+```go
+package main
+
+import (
+	"fmt"
+	student "./student"
+)
+
+func main() {
+	student.Raid1c(1,1)
+}
+```
+
+And its output :
+
+```console
+student@ubuntu:~/student/test$ go build
+student@ubuntu:~/student/test$ ./test
+A
+student@ubuntu:~/student/test$
+```
+
+Program #4
+
+```go
+package main
+
+import (
+	"fmt"
+	student "./student"
+)
+
+func main() {
+	student.Raid1c(1,5)
+}
+```
+
+And its output :
+
+```console
+student@ubuntu:~/student/test$ go build
+student@ubuntu:~/student/test$ ./test
+A
+B
+B
+B
+C
+student@ubuntu:~/student/test$
+```
diff --git a/subjects/raid1d.en.md b/subjects/raid1d.en.md
new file mode 100644
index 000000000..de93e81e5
--- /dev/null
+++ b/subjects/raid1d.en.md
@@ -0,0 +1,121 @@
+## raid1d
+
+### Instructions
+
+Write a function `Raid1d` that prints a **valid** square of width `x` and of height `y`.
+
+The function must draw the squares as in the examples.
+
+### Expected function
+
+```go
+func Raid1d(x,y int) {
+
+}
+```
+
+### Usage
+
+Here is are possible programs to test your function :
+
+Program #1
+
+```go
+package main
+
+import (
+	"fmt"
+	student "./student"
+)
+
+func main() {
+	student.Raid1d(5,3)
+}
+```
+
+And its output :
+
+```console
+student@ubuntu:~/student/test$ go build
+student@ubuntu:~/student/test$ ./test
+ABBBC
+B   B
+ABBBC
+student@ubuntu:~/student/test$
+```
+
+Program #2
+
+```go
+package main
+
+import (
+	"fmt"
+	student "./student"
+)
+
+func main() {
+	student.Raid1d(5,1)
+}
+```
+
+And its output :
+
+```console
+student@ubuntu:~/student/test$ go build
+student@ubuntu:~/student/test$ ./test
+ABBBC
+student@ubuntu:~/student/test$
+```
+
+Program #3
+
+```go
+package main
+
+import (
+	"fmt"
+	student "./student"
+)
+
+func main() {
+	student.Raid1d(1,1)
+}
+```
+
+And its output :
+
+```console
+student@ubuntu:~/student/test$ go build
+student@ubuntu:~/student/test$ ./test
+A
+student@ubuntu:~/student/test$
+```
+
+Program #4
+
+```go
+package main
+
+import (
+	"fmt"
+	student "./student"
+)
+
+func main() {
+	student.Raid1d(1,5)
+}
+```
+
+And its output :
+
+```console
+student@ubuntu:~/student/test$ go build
+student@ubuntu:~/student/test$ ./test
+A
+B
+B
+B
+A
+student@ubuntu:~/student/test$
+```
diff --git a/subjects/raid1e.en.md b/subjects/raid1e.en.md
new file mode 100644
index 000000000..f6b249c6e
--- /dev/null
+++ b/subjects/raid1e.en.md
@@ -0,0 +1,121 @@
+## raid1e
+
+### Instructions
+
+Write a function `Raid1e` that prints a **valid** square of width `x` and of height `y`.
+
+The function must draw the squares as in the examples.
+
+### Expected function
+
+```go
+func Raid1e(x,y int) {
+
+}
+```
+
+### Usage
+
+Here is are possible programs to test your function :
+
+Program #1
+
+```go
+package main
+
+import (
+	"fmt"
+	student "./student"
+)
+
+func main() {
+	student.Raid1e(5,3)
+}
+```
+
+And its output :
+
+```console
+student@ubuntu:~/student/test$ go build
+student@ubuntu:~/student/test$ ./test
+ABBBC
+B   B
+CBBBA
+student@ubuntu:~/student/test$
+```
+
+Program #2
+
+```go
+package main
+
+import (
+	"fmt"
+	student "./student"
+)
+
+func main() {
+	student.Raid1e(5,1)
+}
+```
+
+And its output :
+
+```console
+student@ubuntu:~/student/test$ go build
+student@ubuntu:~/student/test$ ./test
+ABBBC
+student@ubuntu:~/student/test$
+```
+
+Program #3
+
+```go
+package main
+
+import (
+	"fmt"
+	student "./student"
+)
+
+func main() {
+	student.Raid1e(1,1)
+}
+```
+
+And its output :
+
+```console
+student@ubuntu:~/student/test$ go build
+student@ubuntu:~/student/test$ ./test
+A
+student@ubuntu:~/student/test$
+```
+
+Program #4
+
+```go
+package main
+
+import (
+	"fmt"
+	student "./student"
+)
+
+func main() {
+	student.Raid1e(1,5)
+}
+```
+
+And its output :
+
+```console
+student@ubuntu:~/student/test$ go build
+student@ubuntu:~/student/test$ ./test
+A
+B
+B
+B
+C
+student@ubuntu:~/student/test$
+```