diff --git a/Day2/2b_exercise_optimization2.ipynb b/Day2/2b_exercise_optimization2.ipynb
index 49a86ed..970e906 100644
--- a/Day2/2b_exercise_optimization2.ipynb
+++ b/Day2/2b_exercise_optimization2.ipynb
@@ -1,3 +1,4 @@
+# my first pull request 
 {
  "cells": [
   {