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: social gathering 
Words: club, group, meeting, grilled cheese, convention

Ex Output:
grilled cheese


Ex Input:
Category: secretary duty 
Words: folder, support, order office supplies, correspondence, file

Ex Output:
folder


Ex Input:
Category: card games 
Words: gin, rum, war, blackjack, hearts

Ex Output:

rum