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: outdoor sport activity 
Words: hunt, row, wrestle, fish, hamster

Ex Output:
hamster


Ex Input:
Category: ocean 
Words: flow, current, course, moon, dastards

Ex Output:
dastards


Ex Input:
Category: emotional status 
Words: calm, arrest, mad, fine, ok

Ex Output:

arrest