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: boxing terminology 
Words: deck, ring, head, knockout, glove

Ex Output:
head


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

Ex Output:
calories


Ex Input:
Category: aesthetic characteristic 
Words: unprejudiced, color, even, variety, fair

Ex Output:

unprejudiced