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 confused Maria and Anna.
acceptable

Susan will never sing at weddings.
acceptable

Here's a knife for you to cut up the onions with.

acceptable