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".

Ex Input:
You can do it, but you better not.

Ex Output:
acceptable


Ex Input:
It is easy to please Kim.

Ex Output:
acceptable


Ex Input:
Who did he believe that he would one day meet?

Ex Output:

acceptable