Create a table of every possibility you want.

table_generator.py

#!/usr/bin/python

import itertools
alphabet = ['a','b','c','d','e','f','g','h','i','j','k','l','m','n','o','p','q','r','s'\
,'t','u','v','w','x','y','z']
maxStringLength = 3
file=open("data.txt",'w');

for x in range (1, maxStringLength + 1):
    for i in itertools.product(alphabet,repeat=x):
      file.write(''.join(i))
      file.write('\n')