diff --git a/my_script.py b/my_script.py
index 9d6664f..6245bd5 100644
--- a/my_script.py
+++ b/my_script.py
@@ -1,6 +1,7 @@
 def main():
     print("Hello world!")
     c = a+b
+    d = a - b
 
 
 main()