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: accomodation 
Words: even, townhome, level, flat, paved

Ex Output:
level


Ex Input:
Category: bird 
Words: crane, sandpiper, hoist, windlass, goose

Ex Output:
windlass


Ex Input:
Category: direction 
Words: down, unhappy, opposite of up, backward, forward

Ex Output:

unhappy