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: boxing terminology 
Words: caution, hearts, canvas, deck, fight

Ex Output:
hearts


Ex Input:
Category: computers 
Words: ram, file, prepare, keys, format

Ex Output:
prepare


Ex Input:
Category: poker 
Words: joker, deck, chips, apron, pack

Ex Output:

apron