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: direction 
Words: down, lower, emotional upsets, below, falling

Ex Output:
emotional upsets


Ex Input:
Category: elements 
Words: let go, flame, inferno, fire, water

Ex Output:
let go


Ex Input:
Category: aesthetic characteristic 
Words: flaxen, even, fair, tangle, milky

Ex Output:

tangle