Definition: You are given a paragraph, with numbered sentences, and a question. Write the numbers of the sentences needed to answer the given question. Separate multiple sentence numbers with a comma (", "). E.g. "1, 2" would be the correct response if Sent 1 and Sent 2 are needed to answer the given question (do not include sentences that contain no information that is necessary to answer the question). Sort the sentence numbers in an increasing order (i.e., '1, 2', instead of '2, 1'). Your answer should not contain anything than the sentence numbers separated by a comma (e.g. '1, 2, 3, 4'). The given question requires more than one sentence to answer. So, your answer must contain at least one comma (", ").
Input: Paragraph- Sent 1: Soon Sweetwater realised that his work was over for the night and planned to leave.
Sent 2: But there was one point to be settled first.
Sent 3: Was there any other means of exit from these grounds save that offered by the ordinary driveway?
Sent 4: He had an impression that in one of his strolls about, he had detected the outlines of a door in what looked like a high brick wall in the extreme rear.
Sent 5: If so, it were well worth his while to know where that door led.
Sent 6: Working his way along in the shadow cast by the house and afterward by the stable itself, he came upon what was certainly a wall and a wall with a door in it.
Sent 7: He could see the latter plainly from where he halted in the thick of the shadows.
Sent 8: The moonlight shone broadly on it, and he could detect the very shape and size of its lock.
Sent 9: It might be as well to try that lock, but he would have to cross a very wide strip of moonlight in order to do so, and he feared to attract attention to his extreme inquisitiveness.
Sent 10: Yet who was there to notice him at this hour?
Sent 11: Mr. Cumberland had not moved, the girls were upstairs, Zadok was busy with his paper, and the footman dozing over his pipe in his room over the stable.
Sent 12: Sweetwater had just come from that room, and he knew. 
Question: What room was Sweetwater in before?.
Output:
11, 12.