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: elements 
Words: ban, fire, combustion, ground, flame

Ex Output:
ban


Ex Input:
Category: direction 
Words: down, lower, emotional upsets, below, falling

Ex Output:
emotional upsets


Ex Input:
Category: date status 
Words: late, whirlpool, current, early, detests

Ex Output:

whirlpool