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: They let him go yesterday, he.
Example Output: unacceptable

Example Input: Do not use these words in the beginning of a sentence.
Example Output: acceptable

Example Input: Tom ordered bacon, and Dick lettuce, and Harry tomatoes.
Example Output:
acceptable