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".

[EX Q]: With their teacher, the kids have arrived safely, hasn't he?
[EX A]: unacceptable

[EX Q]: The king of Rock and Roll is more popular than the one of country music.
[EX A]: unacceptable

[EX Q]: Mary regretted that she did anything to help him.
[EX A]:
acceptable