diff --git a/90_Tower/python/tower.py b/90_Tower/python/tower.py
index 72c67a61..5e4a25b7 100644
--- a/90_Tower/python/tower.py
+++ b/90_Tower/python/tower.py
@@ -60,7 +60,10 @@ GOOD LUCK!
 
 class Game:
     def __init__(self):
-        self.__sizes = [3, 5, 7]  # ,9,11,13,15]
+        # use fewer sizes to make debugging easier
+        # self.__sizes = [3, 5, 7]  # ,9,11,13,15]
+        self.__sizes = [3, 5, 7, 9, 11, 13, 15]
+        
         self.__sizes.sort()
 
         self.__towers = []
@@ -156,4 +159,4 @@ while True:
                 print("'YES' OR 'NO' PLEASE\n")
     elif game.moves() > 128:
         print("SORRY, BUT I HAVE ORDERS TO STOP IF YOU MAKE MORE THAN 128 MOVES.")
-        sys.exit(0)
\ No newline at end of file
+        sys.exit(0)