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: moral characteristic 
Words: dishonest, ok, fair, mild, fine
Example Output: mild

Example Input: Category: bird 
Words: crane, hoist, egret, tackle, ostrich
Example Output: hoist

Example Input: Category: emotional status 
Words: down, melancholy, loveful, lower, emotionalities
Example Output:
lower