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: Which book he read the book was that one.

A: unacceptable
****
Q: Lee solved the puzzle how Kim solved it.

A: unacceptable
****
Q: This oven cooks well.

A:
acceptable
****