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: I wonder whether you'd be kind enough to give us information.

Output: acceptable


Input: Consider Input: Which folks up at corporate headquarters do you think that the sooner you solve this problem, the quicker you'll be able to tell t to buzz off?


Output: unacceptable