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".

The men arrived all.
unacceptable

He impresses his friends all as pompous.
unacceptable

It was several young students that the policeman met in the park last night.

acceptable