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: nutritional value 
Words: iron, heavy, vitamin c, fat, brittleness

Ex Output:
brittleness


Ex Input:
Category: date status 
Words: delayed, current, whirlpool, do tests, up to the moment

Ex Output:
whirlpool


Ex Input:
Category: ocean 
Words: flow, current, course, moon, dastards

Ex Output:

dastards