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:
dump truck, hoist, crane, ostrich, goose

Ex Output:
dump truck


Ex Input:
stormy, fair, just, mild, brisk

Ex Output:
just


Ex Input:
fair, variety, make the grade, milky, size

Ex Output:

make the grade