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: In the book, he talks about his ups and downs at school.
Example Output: acceptable

Example Input: I am frightened of tigers.
Example Output: acceptable

Example Input: Today there is little or no official harassment of lesbians and gays by the national government, although autonomous governments might.
Example Output:
acceptable