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: The foxes seem compatible with the chickens.

Output: acceptable


Input: Consider Input: I know which book Mag read, and which book Bob discussed after I had.

Output: unacceptable


Input: Consider Input: It was not until I was perhaps twenty-five or thirty that I read them and enjoyed them.


Output: acceptable