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:
blow, squander, apple, fritter, divide

Ex Output:
apple


Ex Input:
board, caution, fight, punch, deck

Ex Output:
board


Ex Input:
board, queen, deck, level, draw

Ex Output:

level