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: Springfield would have built a police station with the federal grant.
Example Output: acceptable

Example Input: We peered through the screen.
Example Output: acceptable

Example Input: John is not more reliable a fellow than Bill.
Example Output:
unacceptable