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: computers 
Words: folder, document, file, image, correspondence

Ex Output:
correspondence


Ex Input:
Category: physical property 
Words: brittleness, protein, bulky, skinny, fat

Ex Output:
protein


Ex Input:
Category: geographical property 
Words: level, flat, lined, condominium, smooshed

Ex Output:

condominium