<b_jonas> learn ayacc is ais523\'s yacc parser generator implementation, get it from (darcs clone http://nethack4.org/projects/ayacc) or a snapshot from "http://nethack4.org/pastebin/ayacc-2020-04.tar.gz".

#!/usr/bin/python

import random
import string

print "".join(random.choice(string.ascii_lowercase) for _ in xrange(15))