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: Hamsters mother attractive offspring.
Example Output: acceptable

Example Input: Martha carved a piece of wood into a toy for the baby.
Example Output: acceptable

Example Input: He has books by several Greek authors.
Example Output:
acceptable