They accept any valid variations. Take a look at some of the past puzzles, if you get a chance. Just a couple of weeks ago Herr Shortz had one answer in mind, but several people sent in another which was also accepted (of course I can't remember what it/they was/were). This puzzle came from a 1929 puzzle magazine. I've never heard a furriner win, but hey, doc, you could be the first!