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:
arrest, fine, ticket, beautiful, custody

Ex Output:
beautiful


Ex Input:
misuse, danish, fritter, dally, whittle

Ex Output:
danish


Ex Input:
ground, shameful, opposite of up, backward, down

Ex Output:

shameful