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: physical property 
Words: large, obese, fat, chunky, fiber

Output: fiber


Input: Consider Input: Category: direction 
Words: below, backward, melancholy, down, ground

Output: melancholy


Input: Consider Input: Category: direction 
Words: lower, downward, up, emotional supports, down


Output: emotional supports