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: weather 
Words: stormy, make the grade, sunny, texture, fair

Ex Output:
texture


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

Ex Output:
comfortable


Ex Input:
Category: secretary duty 
Words: answer calls, answer, file, firewall, support

Ex Output:

firewall