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: moral characteristic 
Words: milky, fair, ok, loyal, unprejudiced

Ex Output:
milky


Ex Input:
Category: physical property 
Words: thin, brittleness, heavy, angular momentum, fat

Ex Output:
heavy


Ex Input:
Category: physical activity 
Words: hike, squat, crouch, dog, duck

Ex Output:

dog