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 teacher ordered the two boys both to pay close attention.
acceptable

Tony broke her arm.
acceptable

She pinched that he feels pain.

unacceptable