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: nutritional value 
Words: heavy, protein, fat, sugars, area

Ex Output:
area


Ex Input:
Category: weather 
Words: windy, stormy, fair, tone, tangle

Ex Output:
tone


Ex Input:
Category: elements 
Words: fire, air, ice, flame, recruit

Ex Output:

recruit