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:
falsification, fib, invent, fudge, cupcake

Ex Output:
cupcake


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

Ex Output:
pork


Ex Input:
water, wave, drink, detests, current

Ex Output:

detests