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]: air, fire, hire, ban, promote
[A]: air

[Q]: invent, smuggled, smear, fudge, pie
[A]: pie

[Q]: hot, classy, pretty, fine, probation
[A]:
probation