Definition: 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".

Positive Example 1 -
Input: Our friends won't buy this analysis, let alone the next one we propose.
Output: acceptable

Positive Example 2 -
Input: The knee replacement candidate groaned up the stairs.
Output: acceptable

Negative Example 1 -
Input: They made him to exhaustion.
Output: acceptable

Negative Example 2 -
Input: They made him into a monster.
Output: unacceptable

Now complete the following example -
Input: Hank plays the guitar and finds arrangements for all the old folk songs which are still sung in these hills, and Ernie writes down all the old folk songs which are still sung in these hills.
Output: acceptable