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: emotional status 
Words: fine, relaxed, comfortable, prime, content

Ex Output:
prime


Ex Input:
Category: poker 
Words: board, joker, deck, fold, apron

Ex Output:
apron


Ex Input:
Category: animal 
Words: fish, shark, kayak, sea turtle, dolphin

Ex Output:

kayak