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: protein, pasty, fat, thin, angular momentum

Output: protein


Input: Consider Input: Category: boxing terminology 
Words: ring, lifeline, deck, punch, corner

Output: lifeline


Input: Consider Input: Category: moral characteristic 
Words: decent, impartial, light, fair, dishonest


Output: light