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: The stone knocked against the pole into the road.
Example Output: acceptable

Example Input: Tom picked these grapes, and I washed these grapes, and Suzie will prepare these grapes.
Example Output: acceptable

Example Input: The parcel reached John.
Example Output:
acceptable