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: corporate 
Words: unyielding, concerted, firm, combined, united

Ex Output:
unyielding


Ex Input:
Category: aesthetic characteristic 
Words: comfortable, pretty, there, fine, classy

Ex Output:
comfortable


Ex Input:
Category: police punishment 
Words: flyaway, money, suspension, fine, classy

Ex Output:

classy