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: consumer product 
Words: shop, tools, happy, service, content

Ex Output:
happy


Ex Input:
Category: aesthetic characteristic 
Words: fair, medium, size, light, loyal

Ex Output:
loyal


Ex Input:
Category: chocolate food 
Words: brownie, chocolate, truffles, replace, fudge

Ex Output:

replace