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

Output: kind


Input: Consider Input: Category: guitar part 
Words: neck, fret, jack, pick, angry

Output: angry


Input: Consider Input: Category: weather 
Words: brisk, deal, fair, tangle, trustworthy


Output: trustworthy