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:
unyielding, concerted, firm, combined, united

Ex Output:
unyielding


Ex Input:
deck, board, cards, knockout, draw

Ex Output:
knockout


Ex Input:
fold, queen, deck, galley, call

Ex Output:

galley