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]: Stephen believed it to be easy to please Kim.
[A]: acceptable


[Q]: He's a that reliable man.
[A]: unacceptable


[Q]: Brian was wiping.
[A]:
acceptable