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:
leverage, solid, firm, amalgamated, concerted

Ex Output:
solid


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

Ex Output:
hoist


Ex Input:
wiener, sausage, brash, bun, frank

Ex Output:

brash