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: Because John persuaded Sally to, he didn't have to talk to the reporters.
Example Output: acceptable

Example Input: I demand that John pay more, the more he eats.
Example Output: acceptable

Example Input: There was a snake behind the car Fred was sitting in.
Example Output:
acceptable