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: hike, cow, trap, row, fish

Ex Output:
cow


Ex Input:
Category: police punishment 
Words: fine, prime, firstrate, comfortable, ticket

Ex Output:
comfortable


Ex Input:
Category: emotional status 
Words: suspension, alert, fine, alright, relaxed

Ex Output:

suspension