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, fat, protein, obese, carbs

Ex Output:
obese


Ex Input:
Category: elements 
Words: fire, earth, water, blaze, recruit

Ex Output:
recruit


Ex Input:
Category: widespread 
Words: fighter, general, typical, normal, common

Ex Output:

fighter