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: If he has to wait, John gets angry.
Example Output: acceptable

Example Input: It seemed to rain.
Example Output: acceptable

Example Input: The fact that the scientists used the latest technology to verify was reported at the recent conference.
Example Output:
acceptable