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: weather 
Words: raining, sunny, fair, ghostly, windy

Ex Output:
ghostly


Ex Input:
Category: type of sandwich 
Words: open-faced, team, roll, doorstep, club

Ex Output:
team


Ex Input:
Category: store status 
Words: near, close, shut down, steady, busy

Ex Output:

near