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: corporation, firm, alignment, taut, leverage

Ex Output:
taut


Ex Input:
Category: police punishment 
Words: prime, penalty, fine, mad, arrest

Ex Output:
mad


Ex Input:
Category: chocolate food 
Words: fix, cookies, brownie, fudge, truffles

Ex Output:

fix