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:
deck, dock, galley, joker, hull

Ex Output:
joker


Ex Input:
drink, detestings, whirlpool, main, current

Ex Output:
detestings


Ex Input:
thing, specialty, content, file, fearful

Ex Output:

fearful