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:
gunwale, stern, deck, box, bow

Ex Output:
box

Ex Input:
group, clan, hamburger, club, bar

Ex Output:
hamburger

Ex Input:
unprejudiced, fair, dishonest, unjust, deal

Ex Output:
deal