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.

Example Input: Category: direction 
Words: kind, descending, down, opposite of up, flat
Example Output: kind

Example Input: Category: weather 
Words: fair, sunny, stormy, make the grade, variety
Example Output: variety

Example Input: Category: emotional status 
Words: well, detached, happy, fine, pretty
Example Output:
pretty