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: guitar part 
Words: fret, notes, emotional upsets, output cord, truss rod

Ex Output:
emotional upsets


Ex Input:
Category: physical activity 
Words: dog, push, duck, squat, jog

Ex Output:
dog


Ex Input:
Category: emotional status 
Words: emotional supports, forward, down, loveful, kind

Ex Output:

forward