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: below, backward, melancholy, down, ground

Ex Output:
melancholy


Ex Input:
Category: aesthetic characteristic 
Words: level, fair, milky, sunny, well

Ex Output:
sunny


Ex Input:
Category: police punishment 
Words: well, firstrate, fine, flyaway, money

Ex Output:

well