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: consumer product 
Words: merchandise, happy, thing, content, service

Ex Output:
happy


Ex Input:
Category: weather 
Words: even, tangle, mild, fair, 70

Ex Output:
even


Ex Input:
Category: police punishment 
Words: acceptable, ticket, fine, jail, custody

Ex Output:

acceptable