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: boxing terminology 
Words: corner, fold, deck, knockout, level

Ex Output:
fold


Ex Input:
Category: police punishment 
Words: jail, fine, bright, arrest, flyaway

Ex Output:
bright


Ex Input:
Category: boats 
Words: galley, head, suits, deck, dock

Ex Output:

suits