<|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 four-digit number starts with the digit 6. This digit is moved to the end of the number. The resulting number is 1152 less than the original number. Find the original 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
6538
A four-digit number starts with the digit 6. This digit is moved to the end of the number. The resulting number is 1152 less than the original number. Find the original number.
test