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".

Example Input: This is the sort of problem which the sooner you solve the more easily you'll satisfy the folks up at corporate headquarters.
Example Output: acceptable

Example Input: Smith inscribed the ring with his name.
Example Output: acceptable

Example Input: I lent Tony the book halfway.
Example Output:
unacceptable