Given a category and a set of five words, find the word from the set that does not belong (i.e. is the least relevant) with the other words in the category. Words are separated by commas.

Ex Input:
Category: personal characteristic 
Words: freezing, calm, positive, cool, popular

Ex Output:
freezing


Ex Input:
Category: outdoor sport activity 
Words: whale, fish, raft, hiking, kayak

Ex Output:
whale


Ex Input:
Category: poker 
Words: deck, draw, pack, blind, fight

Ex Output:

fight