Just enter in any alphanumeric phrase, and let The classic phrase is "METHINKS IT IS LIKE A WEASEL" How it works: This program uses artificial selection, and in this case, it selects for how close a variation of the seed (the best variation from the generation prior) is to the target phrase. In each generation, there are 100 variations of the seed. Each time a new variation is made, every letter has a 5% chance of being replaced a random character, instead of the character from the seed.
For more info on weasel programs, visit the wikipedia article: en.wikipedia.org/wiki/Weasel_program