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: type of sandwich 
Words: meeting, bacon, submarine, toast, club

Ex Output:
meeting


Ex Input:
Category: location (proximity) 
Words: on top of, touching, finished for the day, close, right there

Ex Output:
finished for the day


Ex Input:
Category: aesthetic characteristic 
Words: neat, fine, classy, penalty, high quality

Ex Output:

penalty