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 angrier Sue gets, the more Fred admires her.
Example Output: acceptable

Example Input: him belief that Mary kissed Bill is mistaken.
Example Output: unacceptable

Example Input: There ran a little boy in the yard.
Example Output:
unacceptable