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 Input:
Copper rods bend easily.

Ex Output:
acceptable


Ex Input:
The little boy hit the child with a toy.

Ex Output:
acceptable


Ex Input:
Maxwell isn't half the doctor that I'm certain that he would be if he studied.

Ex Output:

acceptable