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: check, stern, hull, galley, deck

Ex Output:
check


Ex Input:
Category: ocean 
Words: current, early, water, brine, tide

Ex Output:
early


Ex Input:
Category: aesthetic characteristic 
Words: high quality, exquisite, ok, fine, attractive

Ex Output:

ok