diff --git a/42sh/sample/yale0.ex b/42sh/sample/yale0.ex
new file mode 100644
index 00000000..8d12c570
--- /dev/null
+++ b/42sh/sample/yale0.ex
@@ -0,0 +1 @@
+< A B | ( C 2> D & E < F ) > G ; H=I J K
diff --git a/42sh/sample/yale1.ex b/42sh/sample/yale1.ex
new file mode 100644
index 00000000..372d7e63
--- /dev/null
+++ b/42sh/sample/yale1.ex
@@ -0,0 +1 @@
+< A B | C | D | E > F 
diff --git a/42sh/sample/yale2.ex b/42sh/sample/yale2.ex
new file mode 100644
index 00000000..71e5a6d8
--- /dev/null
+++ b/42sh/sample/yale2.ex
@@ -0,0 +1 @@
+ A && B || C && D
diff --git a/42sh/sample/yale3.ex b/42sh/sample/yale3.ex
new file mode 100644
index 00000000..260a8b62
--- /dev/null
+++ b/42sh/sample/yale3.ex
@@ -0,0 +1 @@
+A ; B & C ; D || E
diff --git a/42sh/sample/yale5.ex b/42sh/sample/yale5.ex
new file mode 100644
index 00000000..4cd3a71e
--- /dev/null
+++ b/42sh/sample/yale5.ex
@@ -0,0 +1 @@
+(A ; B &) | (C || D) && E