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:
fair, impartial, tone, well, balanced

Ex Output:
tone


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

Ex Output:
davit


Ex Input:
attractive, fine, decent, alert, relaxed

Ex Output:

attractive