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".

Little children amuse easily.
acceptable

John a decidedly taller man than Bill.
acceptable

John knew that there would be a picture of himself hanging in the post.

acceptable