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]: The harder it rains, how much faster a flow do you see in the river?
[A]: acceptable


[Q]: Shaving myself is difficult for me.
[A]: acceptable


[Q]: John kept behind the counter.
[A]:
unacceptable