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: bird 
Words: flamingo, crane, neck, ostrich, davit

Ex Output:
davit


Ex Input:
Category: emotional status 
Words: emotional state, loveful, emotionalities, opposite of up, down

Ex Output:

opposite of up