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]: clothing, content, service, substance, ecstatic
[A]: ecstatic


[Q]: ok, neat, fine, attractive, beautiful
[A]: ok


[Q]: descending, ashamed, down, south, left
[A]:
ashamed