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: emotional status 
Words: down, emotional state, loveful, ashamed, flat

Ex Output:
flat


Ex Input:
Category: physical property 
Words: large, fat, capacitance, calories, ugly

Ex Output:
calories


Ex Input:
Category: boxing terminology 
Words: knockout, apron, fight, deck, sail

Ex Output:

sail