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: waggle, drive, fly, bee, dive

Ex Output:
drive


Ex Input:
Category: physical activity 
Words: sprint, cow, duck, jog, squat

Ex Output:
cow


Ex Input:
Category: chocolate food 
Words: truffles, wrongful, fudge, brownies, pie

Ex Output:

wrongful