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: deck, hearts, crew, bow, head

A: hearts
****
Q: club, open-faced, bacon, french toast, dance hall

A: dance hall
****
Q: group, clan, hamburger, club, bar

A:
hamburger
****