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: activity 
Words: blow, waste away, sweet roll, whittle, fritter

Ex Output:
sweet roll


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

Ex Output:
let go


Ex Input:
Category: moral characteristic 
Words: loyal, sunny, fair, balanced, impartial

Ex Output:

sunny