--- a/day1/exercise/collatz.py	Sun Jun 27 20:23:10 2010 -0500
+++ b/day1/exercise/collatz.py	Sun Jun 27 22:05:22 2010 -0500
@@ -1,8 +1,8 @@
-a = int( raw_input( 'Enter number: ') )
-while a != 4:
-    print a,
-    if a % 2 == 1:
-        a = a * 3 + 1
+num = int( raw_input( 'Enter number: ') )
+while num != 4:
+    print num,
+    if num % 2 == 1:
+        num = num * 3 + 1
     else:
-        a /= 2
+        num /= 2
 print 4, 2, 1