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: animal 
Words: goat, cat, fish, hamster, hunting

Ex Output:
hunting


Ex Input:
Category: boxing terminology 
Words: corner, fold, deck, knockout, level

Ex Output:
fold


Ex Input:
Category: direction 
Words: unhappy, down, sliding, lower, flat

Ex Output:

unhappy