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:
prison, fine, there, handsome, high quality

Ex Output:
prison


Ex Input:
concrete pourer, winch, excavator, hoist, crane

Ex Output:
hoist


Ex Input:
ok, money, custody, penalty, fine

Ex Output:

ok