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: My father, that he's lived here all his life is well-known to the cops.

Output: acceptable


Input: Consider Input: I doubt you can help me in understanding this.

Output: acceptable


Input: Consider Input: The men doctors of medicine.


Output: unacceptable