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: direction 
Words: kind, descending, down, opposite of up, flat

Ex Output:
kind


Ex Input:
Category: outdoor sport activity 
Words: hike, cow, trap, row, fish

Ex Output:
cow


Ex Input:
Category: weather 
Words: fair, just, brisk, clime, windy

Ex Output:

just