diff --git a/hw2/hw2pr1/hw2pr1.cpp b/hw2/hw2pr1/hw2pr1.cpp
index 7d44473..225a674 100644
--- a/hw2/hw2pr1/hw2pr1.cpp
+++ b/hw2/hw2pr1/hw2pr1.cpp
@@ -22,9 +22,20 @@ node makeTree(string input, node n, int level)
 
     while(input.length() != 0)
     {
+        // If the char is a digit.
         if(tempc)
         {
         }
+        
+        // If the char is a comma.
+        else if(tempc == ',')
+        {
+        }
+
+        // If the char is a close paranthesis.
+        else if(tempc == ')')
+        {
+        }
     }
 }