<|im_start|>system
You are a helpful assistant. You first think about the reasoning process in the mind and then provide the user with the answer. You should try to truely solve the question by yourself without cheating.  <|im_end|>
<|im_start|>user
 A person walks on a 400-meter circular track at a speed of 6 kilometers per hour. They start from point A and walk clockwise for 1 minute, then counterclockwise for 3 minutes, and clockwise again for 5 minutes. What is the minimum time they need to return to the starting point A? Express your answer in minutes as a whole number. Show your work in <think> </think> tags. And return the final answer in <answer> </answer> tags.<|im_end|>
<|im_start|>assistant
Let me solve this step by step.
<think>
user
1
A person walks on a 400-meter circular track at a speed of 6 kilometers per hour. They start from point A and walk clockwise for 1 minute, then counterclockwise for 3 minutes, and clockwise again for 5 minutes. What is the minimum time they need to return to the starting point A? Express your answer in minutes as a whole number.
test