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:
hiking, stingray, shark, fish, tiger

Ex Output:
hiking


Ex Input:
deck, board, cards, knockout, draw

Ex Output:
knockout


Ex Input:
chips, canvas, deck, jab, blocking

Ex Output:

chips