diff --git a/main.py b/main.py
index 8416900..a59075f 100644
--- a/main.py
+++ b/main.py
@@ -59,37 +59,19 @@ def calcul(left: int, right: int, res: int, operation='+'):
     Vérifie si left operation b == c, où a, b et c sont des entiers.
     L'opération peut être +, -, *, /, &, |, ^, % ou l'un de ses alias anglais.
     """
-    if operation == '+':
+    if operation in ['+', 'add', 'sum']:
         result = left + right
-    if operation == 'sum':
-        result = left + right
-    if operation == 'add':
-        result = left + right
-    if operation == '-':
+    if operation in ['-', 'sub']:
         result = left - right
-    if operation == 'sub':
-        result = left - right
-    if operation == '*':
+    if operation in ['*', 'mul', 'prod']:
         result = left * right
-    if operation == 'mul':
-        result = left * right
-    if operation == 'prod':
-        result = left * right
-    if operation == '/':
+    if operation in ['/', 'div']:
         result = left / right
-    if operation == 'div':
-        result = left / right
-    if operation == '&':
+    if operation in ['&', 'and']:
         result = left & right
-    if operation == 'and':
-        result = left & right
-    if operation == '|':
+    if operation in ['|', 'or']:
         result = left | right
-    if operation == 'or':
-        result = left | right
-    if operation == '^':
-        result = left ^ right
-    if operation == 'xor':
+    if operation in ['^', 'xor']:
         result = left ^ right
     else:
         result = left % right