Given a set of five words, generate the word from the set that does not belong (i.e. is the least relevant) with the other words. Words are separated by commas.

Ex Input:
format, file, support, text, download

Ex Output:
support


Ex Input:
corner, deck, fight, knockout, blind

Ex Output:
blind


Ex Input:
warm, ok, fair, clime, luke

Ex Output:

ok