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: John loves his puppy.

A: acceptable
****
Q: That new handle detaches easily.

A: acceptable
****
Q: I know two men who are behind me.

A:
acceptable
****