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: animal 
Words: trap, dog, fish, tiger, horse

Ex Output:
trap


Ex Input:
Category: weather 
Words: brisk, ghostly, windy, fair, deal

Ex Output:
ghostly


Ex Input:
Category: type of sandwich 
Words: hoagie, toast, roll, club, meeting

Ex Output:

meeting