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: Mary has never kissed a Man taller than John.
Example Output: acceptable

Example Input: Tom ran the soles off his shoes.
Example Output: acceptable

Example Input: You should avoid to travel in the rush hour.
Example Output:
unacceptable