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]: jail, probation, fine, classy, firstrate
[A]: classy


[Q]: amalgamated, firm, unyielding, shareholders, ceo
[A]: unyielding


[Q]: up to the moment, dastards, current, timely, jetstream
[A]:
jetstream