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".
--------
Question: Lee solved the puzzle how Kim solved it.

Answer: unacceptable


Question: John suddenly got off the bus.

Answer: acceptable


Question: I can well imagine quickly Mary answering the question.

Answer:
unacceptable