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: I've never seen the one man taller than my father.

A: acceptable
****
Q: That's the kindest answer that I ever heard.

A: acceptable
****
Q: Who can put the book in the box?

A:
acceptable
****