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".

Example Input: To behave oneself in public is expected.
Example Output: acceptable

Example Input: A boy did not laugh.
Example Output: acceptable

Example Input: Who do you think Hobbs imagined Mary said Tom saw?
Example Output:
acceptable