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:
blocking, fold, deck, check, board

Ex Output:
blocking


Ex Input:
deal, fair, endure, windy, ghostly

Ex Output:
ghostly


Ex Input:
alert, calm, fine, content, arrest

Ex Output:

arrest