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


[Q]: ecstatic, content, disappointed, sad, service
[A]: service


[Q]: backward, emotionalities, south, down, left
[A]:
emotionalities