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: hull, deck, rudder, check, lifeline

Ex Output:
check


Ex Input:
Category: moral characteristic 
Words: frank, concise, bun, matter of fact, fortitude

Ex Output:
bun


Ex Input:
Category: aesthetic characteristic 
Words: dull, exquisite, level, fine, ticket

Ex Output:

ticket