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: The weightlifter felt a lot more tough when working with barbells than with kettlebells, because the _ worked more complex muscle groups.
Example Output: barbells

Example Input: While the man modified the height of the bike, the boy rode the tricycle, because the _ was the incorrect height.
Example Output: bike

Example Input: The passenger was worried about the elevator being over capacity because the _ appeared too small.
Example Output:
elevator