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: Those books slide across the table easily.

Output: acceptable


Input: Consider Input: Every man lifted the table.

Output: acceptable


Input: Consider Input: Cheryl stood the shelf with the books.


Output: unacceptable