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: penalty, fine, money, arrest, alright

Ex Output:
alright


Ex Input:
Category: social gathering 
Words: grilled cheese, place, club, dance hall, meeting

Ex Output:
grilled cheese


Ex Input:
Category: consumer product 
Words: content, shop, thing, happy, program

Ex Output:

happy