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".

[Q]: The horse broke Penny's shin.
[A]: acceptable


[Q]: I've seen as much of a coward as Frank.
[A]: unacceptable


[Q]: The monkeys kept forgotten their lines.
[A]:
unacceptable