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:
firm, shareholders, common, alignment, taut

Ex Output:
taut


Ex Input:
davit, hoist, crane, sandpiper, davit

Ex Output:
davit


Ex Input:
blaze, water, flame, promote, fire

Ex Output:

promote