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: employment activity 
Words: replace, ice, fire, ban, hire

Output: ice


Input: Consider Input: Category: boats 
Words: hull, deck, rudder, check, lifeline

Output: check


Input: Consider Input: Category: poker 
Words: board, blind, fold, tko, deck


Output: tko