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.

Ex Input:
The mother attended the baby's baptism while the father stayed home, since _ 's presence was optional for the ritual.

Ex Output:
father


Ex Input:
His legs got stronger from pulling the sled instead of pushing the block, although _ was heavier in weight.

Ex Output:
block


Ex Input:
Jack decided to become a vegetarian and to make a mushroom lasagna with substitutes for meat. He decided to swap the _  .

Ex Output:

meat