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: All special rights of voting in the election were abolished.

Output: acceptable


Input: Consider Input: I know which guys you've dated, but I don't know which guys you haven't.

Output: acceptable


Input: Consider Input: Is whether he played the piano known?


Output: unacceptable