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: brittleness, protein, bulky, skinny, fat

Output: protein


Input: Consider Input: Category: weather 
Words: mild, warm, fine, fair, deal

Output: fine


Input: Consider Input: Category: shady activities 
Words: banned, fudge, wrongful, fib, cookies


Output: cookies