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.

Q: I was listening to some music while swimming with my phone and headphone but the headphone later stopped working. The _ is waterproof.

A: phone
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Q: John cannot lift the bar to the top of the rack, so he tried lifting the plank instead. The _ is heavy.

A: bar
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Q: John brought a brand new mac but the keyboard was broken thankfully the mouse was not. The _ made John happy.

A:
mouse
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