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".

Input: Consider Input: I threw Mary the ball, but she was looking at the birds flying overhead and didn't even notice.

Output: acceptable


Input: Consider Input: We persuaded them to examine themselves.

Output: acceptable


Input: Consider Input: To whom the book did you give.


Output: unacceptable