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:
dally, misuse, fritter, whittle, patty

Ex Output:
patty


Ex Input:
hunting, goat, camp, trap, fish

Ex Output:
goat


Ex Input:
hull, board, deck, lifeline, head

Ex Output:

board