Mensanator: > Ever tried to iterate 403 septillion times? The OP is talking about formulas, like: X + Y * Z = W Where X, Y, Z, W distinct and in [1, 26], so you have C(26, 4) combinations that's way less than 26!
>>> binomial(26, 4) 14950 So this can be solved with a xcombinations() generator. Bye, bearophile -- http://mail.python.org/mailman/listinfo/python-list