You need to answer a given question containing a blank (_). Your answer must be one of the two objects mentioned in the question, for example "trophy" and "suitcase". Your answer must not contain a word that is not present in the question. Please don't use articles (e.g., the, a) before the answer.

Input: Consider Input: She had a lower back pain but her headache was gone, so the _ problem was comforting her now.

Output: headache


Input: Consider Input: Jen tried apple cider vinegar and green tea as alternative shampoos, and she found the _ was more gentle.

Output: green tea


Input: Consider Input: The stars that she drew on her paper with a pen didn't show up, because the _ was dark.


Output: paper