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: boats 
Words: deck, call, galley, bridge, stern

Ex Output:
call


Ex Input:
Category: boxing terminology 
Words: canvas, tko, deck, joker, fight

Ex Output:
joker


Ex Input:
Category: social gathering 
Words: team, dance hall, convention, club, grilled cheese

Ex Output:

grilled cheese