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".
--------
Question: the pencil with that he is writing broke.

Answer: unacceptable


Question: To behave oneself in public is expected.

Answer: acceptable


Question: Bill didn't confirm that Roger had eaten anything.

Answer:
unacceptable