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: I wonder whether you'd be kind enough to give us information.
Example Output: acceptable

Example Input: Smith inscribed the ring with his name.
Example Output: acceptable

Example Input: The man that arrived on the train was my brother.
Example Output:
acceptable