Given a set of five words, generate the word from the set that does not belong (i.e. is the least relevant) with the other words. Words are separated by commas.

Ex Input:
canvas, blocking, deck, sail, corner

Ex Output:
sail


Ex Input:
variety, medium, endure, size, fair

Ex Output:
endure


Ex Input:
neat, fine, classy, penalty, high quality

Ex Output:

penalty