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.

Example Input: Category: poker 
Words: fold, blind, deck, draw, box
Example Output: box

Example Input: Category: aesthetic characteristic 
Words: there, ticket, fine, dull, level
Example Output: ticket

Example Input: Category: type of sandwich 
Words: club, hamburger, burger, grilled cheese, clan
Example Output:
clan