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: Mary tried to crack walnuts with her teeth for her heart healthy crunchy salad, but the _  were too weak.

Output: teeth


Input: Consider Input: Bill got a new king sized mattress but had to throw out his old queen bed frame because the _ was larger.

Output: mattress


Input: Consider Input: The developer scrapped the plans to build offices, and instead moved forward with building apartments, because there was high demand for the _ .


Output: apartments