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:
blunt, sausage, hot dog, frank, wienerwurst

Ex Output:
blunt

Ex Input:
hoist, sandpiper, crane, swallow, heron

Ex Output:
hoist

Ex Input:
whirlpool, water, sea, detests, current

Ex Output:
detests