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: physical activity 
Words: summer, roll, plummet, fall, exercise

Ex Output:
summer


Ex Input:
Category: chocolate food 
Words: fudge, banned, brownies, cookies, cake

Ex Output:

banned