The shortest distance from the circle $x^2 + y^2 = 4x + 8y$ to the point $(5,-2)$ can be written in the form $\sqrt{m}$, where $m$ is an integer. Find $m$.
<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
The shortest distance from the circle $x^2 + y^2 = 4x + 8y$ to the point $(5,-2)$ can be written in the form $\sqrt{m}$, where $m$ is an integer. Find $m$.
Please reason step by step, and put your final answer within \boxed{{}}.<|im_end|>
<|im_start|>assistant

user
5
The shortest distance from the circle $x^2 + y^2 = 4x + 8y$ to the point $(5,-2)$ can be written in the form $\sqrt{m}$, where $m$ is an integer. Find $m$.
train