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".

I sent a book to Louis.
acceptable

The farm finally reached John after much litigation.
unacceptable

Hardly was there any rain falling.

acceptable