Make Me A Sandwich

#!/usr/bin/python
#/home/clockworkpcasus/Documents/bin/sandwich.py

# Released under a GPLv3 Licence by Clockwork PC 2011
#
# www.clockworkpc.com.au
#
# You are entitled to the following four freedoms:
# Freedom 0: To run this program for any purpose
# Freedom 1: To study how this program works and change it to make it do what you wish
# Freedom 2: To redistribute copies so you can help your neighbour
# Freedom 3: To distribute copies of your modified version to others

import os

running = True
while running:
    answer = raw_input("""
    What do you want?

    """)
    os.system("clear")
    if "sudo" in answer:
        if "make" in answer:
            if "sandwich" in answer:
                running = False
            else:
                print "Sorry, this is a sandwich-only joke."
    elif "Sudo" in answer:
        if "make" in answer:
            running = False
    elif "make" in answer:
        print "Make it yourself!"
    elif "Make" in answer:
        print "Make it yourself!"
    else:
        print "Bugger off, mate."
print "OK."