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: chocolate food 
Words: replace, fudge, cupcake, heavy, cream

Ex Output:
replace


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

Ex Output:
recruit


Ex Input:
Category: ocean 
Words: postponed, moon, jetstream, current, sea

Ex Output:

postponed