#include<iostream>
using namespace std;
void foo(int a, int b, int c)
{
if(a > b)
foo(c, a, b);
else
cout<<a<<','<<b<<','<<c<<endl;
}
int main()
int a, b, c;
cin >> a >> b >> c;
foo(a, b, c);
return 0;
输入：2 1 3
输出:__________
