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: Fluffy is sick, as not everybody knows.
Example Output: acceptable

Example Input: The more contented the nurses began to believe that we were going to pretend to be, the more angry we grew at the doctors.
Example Output: unacceptable

Example Input: The students felt comfortable in the class.
Example Output:
acceptable