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:
fritter, apple, divide, blueberry, danish

Ex Output:
divide


Ex Input:
dangle, bird, flutter, leap, fly

Ex Output:

flutter