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: police punishment 
Words: comfortable, money, fine, prison, jail time

Ex Output:
comfortable


Ex Input:
Category: police punishment 
Words: jail, fine, bright, arrest, flyaway

Ex Output:
bright


Ex Input:
Category: animal 
Words: pounce, cockroach, train, fly, spider

Ex Output:

train