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: ocean 
Words: flow, current, course, moon, dastards

Ex Output:
dastards


Ex Input:
Category: animal 
Words: waggle, drive, fly, bee, dive

Ex Output:
drive


Ex Input:
Category: chocolate food 
Words: fudge, chocolate cake, molasses, loosen, rich

Ex Output:

loosen