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:
fair, loyal, decent, fine, tone

Ex Output:
tone


Ex Input:
frank, bold, brash, precise, pork

Ex Output:
pork


Ex Input:
galley, deck, punch, hull, stern

Ex Output:

punch