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: physical property 
Words: thin, brittleness, heavy, angular momentum, fat

Ex Output:
heavy


Ex Input:
Category: moral characteristic 
Words: dishonest, ok, fair, mild, fine

Ex Output:
mild


Ex Input:
Category: type of sandwich 
Words: meeting, bacon, submarine, toast, club

Ex Output:

meeting