My wife tried finding all permutations of my name's letters. Didn't believe when I said there were 6! ones...

permutations.py

#! /usr/bin/python

import sys

def permutate(used, free, built, found):
    if free == {} and built not in found:
        found[built] = 1
        print built
        return
    for letter in free.keys():
        newFree = free.copy()
        del(newFree[letter])
        newUsed = used.copy()
        newUsed[letter] = 1
        newBuilt = built + word[letter]
        permutate(newUsed, newFree, newBuilt, found)

if sys.argv.count != 1: exit

word = sys.argv[1]
free = {}
for letter in range(0,len(word)):
    free[letter] = 1

permutate({}, free, "", {})