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: The ship's sinking to collect the insurance was very devious.

Output: unacceptable


Input: Consider Input: My mother baked me a birthday cake.

Output: acceptable


Input: Consider Input: These lines were written by one of Korea's most famous poets.


Output: acceptable