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: boats 
Words: head, hull, knockout, deck, dock

Ex Output:
knockout


Ex Input:
Category: outdoor sport activity 
Words: wrestle, fish, iguana, hiking, hunt

Ex Output:
iguana


Ex Input:
Category: aesthetic characteristic 
Words: fair, well, windy, variety, texture

Ex Output:

windy