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 book with a red cover of poems from Blackwell by Robert Burns takes a very long time to read.

Output: unacceptable


Input: Consider Input: John kept him behind the garage.

Output: acceptable


Input: Consider Input: They believe it to be easy to annoy Ben.


Output: acceptable