Some python newb help please?

[lrwarren94 at gmail.com]

So I'm trying to write a program for a problem in class, and something strange is happening that I can't figure out why is happening. I was wondering if you guys could help me fix it?

http://pastebin.com/6QZTvx6Z

Basically, 1 and 2 work just fine as inputs, but whenever I input 3 or 4, idle just doesn't do anything. Does anyone know why that is? any suggestions on how to fix? Any help is much appreciated :)