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: duplex, studio, cabin, horizontal, flat

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

A: dance hall
****
Q: fair, level, stormy, sunny, tangle

A:
level
****