diff --git a/ex4.ipynb b/ex4.ipynb
index 0120c62..32e47fd 100755
--- a/ex4.ipynb
+++ b/ex4.ipynb
@@ -313,6 +313,7 @@
    "source": [
     "def pr(y, loc):\n",
     "    # TODO: return a number"
+    "    #Do this"
    ]
   },
   {