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, deck, punch, sail, bow

Ex Output:
punch


Ex Input:
down, kind, ashamed, sliding, unhappy

Ex Output:
sliding


Ex Input:
fair, cold, honorable, impartial, equitable

Ex Output:

cold