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: personal characteristic 
Words: assured, refreshing, unruffled, cool, positive

Output: refreshing


Input: Consider Input: Category: type of rigidity 
Words: solid, leverage, hard, unbending, firm

Output: leverage


Input: Consider Input: Category: aesthetic characteristic 
Words: bright, fine, handsome, well, neat


Output: well