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: corner, fold, deck, knockout, level

Ex Output:
fold


Ex Input:
Category: animal 
Words: soar, cockroach, walk, fly, run

Ex Output:
soar


Ex Input:
Category: emotional display 
Words: follow, woo, antling, fawn, identity

Ex Output:

antling