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.

Example Input: He could either build the birdhouse or the tree-house first, but the _ would take less time to construct.
Example Output: birdhouse

Example Input: It took longer to study for the History test, than it did for the Math exam. That's cause the teacher is easier in _ .
Example Output: math

Example Input: Billy skipped piano lessons but made sure to attend his guitar lessons because he hated playing the _ .
Example Output:
piano