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: confident, popular, classy, cool, chill

A: chill
****
Q: wispy, jail, hot, hearing, fine

A: hot
****
Q: rough, private, llc, leverage, firm

A:
rough
****