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 have some voice exercises to play the guitar and sing.
unacceptable

Sorry, I gave last week.
acceptable

The room was left angry by Mary.

unacceptable