user
What has one hundred legs but does not walk
A: blackleg
B: 50x2100 50 panties   
C: last mile
D: rung
E: mutton
assistant
<|begin_of_thought|>

Deep Thought is thinking for 7.5 million years.

<|end_of_thought|>

<|begin_of_solution|>

B

<|end_of_solution|>