user
I twist and turn and leaves a loop.  What am I?
A: heel
B: electric
C: card
D: turnstile
E: shoelace
assistant
<|begin_of_thought|>

Deep Thought is thinking for 7.5 million years.

<|end_of_thought|>

<|begin_of_solution|>

E

<|end_of_solution|>