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.

She had just gotten her first period not long ago, so she used a tampon with a string. She struggled to use the tampon because the _ was short.
string

The cookies had a smoother texture than the brownies because the _ had walnuts in them.
brownies

The cancer had now moved from the blood to the bones, so the _ was now clean .

blood