<|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
 Given that the difference between two 2-digit numbers is 58 and the last two digits of the squares of these two numbers are the same, find the smaller 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
21
Given that the difference between two 2-digit numbers is 58 and the last two digits of the squares of these two numbers are the same, find the smaller number.
test