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: Sandy sang a song.

Output: acceptable


Input: Consider Input: The angrier that Sue gets, the more that Fred admires her.

Output: acceptable


Input: Consider Input: Mira blamed Terry for the accident.


Output: acceptable