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.

Input: Consider Input: Category: direction 
Words: down, lower, emotional upsets, below, falling

Output: emotional upsets


Input: Consider Input: Category: animal 
Words: hamster, mice, fish, tiger, row

Output: row


Input: Consider Input: Category: physical property 
Words: chunky, obese, fiber, fat, bulky


Output: fiber