user
When you use it, you break it  When you break it, you're happy  Cleanup's a joy  Especially for dentists  What is it?
A: solidus
B: pinata
C: novocaine
D: law
E: willing
assistant
<|begin_of_thought|>

Deep Thought is thinking for 7.5 million years.

<|end_of_thought|>

<|begin_of_solution|>

B

<|end_of_solution|>