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.

Input: Consider Input: Category: boxing terminology 
Words: caution, hearts, canvas, deck, fight

Output: hearts


Input: Consider Input: Category: construction 
Words: windlass, crane, dump truck, pelican, digger

Output: pelican


Input: Consider Input: Category: type of sandwich 
Words: hamburger, club, group, submarine, hoagie


Output: group