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.

Ex Input:
Category: boxing terminology 
Words: pack, level, deck, corner, jab

Ex Output:
pack


Ex Input:
Category: weather 
Words: raining, cold, sunny, alright, fair

Ex Output:
alright


Ex Input:
Category: physical property 
Words: fat, angular momentum, ugly, capacitance, fiber

Ex Output:

fiber