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: physical property 
Words: ugly, protein, large, heavy, fat

Ex Output:
protein


Ex Input:
Category: poker 
Words: fold, deck, board, call, knockout

Ex Output:
knockout


Ex Input:
Category: boxing terminology 
Words: deck, ring, joker, corner, blocking

Ex Output:

joker