You're given a sentence and your task is to classify whether the sentence is acceptable or not. Any sentence which is grammatically correct, has a naturalistic text, is written by a native speaker and which minimizes superfluous content is acceptable, otherwise unacceptable. If the sentence is acceptable then write "acceptable", otherwise "unacceptable".

[Q]: It is raining.
[A]: acceptable


[Q]: He's a man to whom liberty we could never grant.
[A]: acceptable


[Q]: That few boys came upset any of the teachers.
[A]:
unacceptable