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.

Q: blow, waste away, fritter, dally, croquet

A: croquet
****
Q: deck, dock, galley, joker, hull

A: joker
****
Q: happy, penalty, ticket, custody, fine

A:
happy
****