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: The thief stole Mr. Smith the painting.
Example Output: unacceptable

Example Input: The umpire fell off it.
Example Output: acceptable

Example Input: They denied the claim that we had advanced by ourselves.
Example Output:
acceptable