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".

Mary has never kissed a Man taller than John.
acceptable

The truck rumbled into the driveway.
acceptable

Any pilot except Sue could be flying this plane.

acceptable