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: emotional status 
Words: down, remorseful, up, emotional supports, shameful

Ex Output:
up


Ex Input:
Category: weather 
Words: cold, luke, fair, mild, light

Ex Output:
light


Ex Input:
Category: window material 
Words: glass, spyhole, bowl, frame, vinyl

Ex Output:

bowl