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: sad, remorseful, down, ashamed, sliding

Ex Output:
sliding


Ex Input:
Category: physical activity 
Words: sprint, cow, duck, jog, squat

Ex Output:
cow


Ex Input:
Category: emotional status 
Words: money, fine, detached, calm, ok

Ex Output:

money