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: That Jack ever slept is possible.

A: unacceptable
****
Q: I've never seen the one taller man than my father.

A: unacceptable
****
Q: That the march should go ahead and that it should be cancelled have been argued by different people at different times.

A:
acceptable
****