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: animal 
Words: train, fly, jump, leap, grasshopper

Ex Output:
train


Ex Input:
Category: consumer product 
Words: jealous, content, merchandise, jewelry, shop

Ex Output:
jealous


Ex Input:
Category: emotional display 
Words: hatchling, fawn, love, pester, lust

Ex Output:

hatchling