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: A is similar to B.
Example Output: acceptable

Example Input: I noticed him kissing Mary.
Example Output: acceptable

Example Input: Jill gave the ball towards Bob.
Example Output:
unacceptable