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: physical property 
Words: sugars, fat, thin, large, angular momentum

Ex Output:
sugars


Ex Input:
Category: aesthetic characteristic 
Words: variety, fair, alright, pale, flaxen

Ex Output:
alright


Ex Input:
Category: emotional status 
Words: concerned, emotional supports, headstock, fret, emotional upsets

Ex Output:

headstock