diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index fb3abe19..0d120c9f 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -35,3 +35,7 @@ Style Guide
 For all contributions, please follow the `Guide Style Guide`:
 
 https://docs.python-guide.org/notes/styleguide/
+
+sum=lambda a,b:a+b
+print(sum(10,3))
+