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: emotional status 
Words: sliding, down, emotionalities, remorseful, emotional upsets

Output: sliding


Input: Consider Input: Category: physical property 
Words: brittleness, protein, bulky, skinny, fat

Output: protein


Input: Consider Input: Category: window material 
Words: knifer, spyhole, frame, handle, glass


Output: knifer