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: She knocked himself on the head with a zucchini.
Example Output: unacceptable

Example Input: It appears to be true that Harry likes girls.
Example Output: acceptable

Example Input: A friend of mine and a girl who was from his home town met in Vienna who was working in Europe.
Example Output:
unacceptable