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: aesthetic characteristic 
Words: ghostly, milky, windy, fair, texture

Ex Output:
windy


Ex Input:
Category: emotional status 
Words: excited, content, item, disappointed, jealous

Ex Output:
item


Ex Input:
Category: animals 
Words: dog, push, duck, swan, pig

Ex Output:

push