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:
crew, ring, deck, blocking, punch

Ex Output:
crew


Ex Input:
camp, fish, iguana, hike, kayak

Ex Output:
iguana


Ex Input:
bend, goose, hike, duck, sprint

Ex Output:

goose