#include <iostream>
using namespace std;
void swap(int &a, int &b) {
int t = a; a = b; b = t;
}
int main() {
int a,b,c,d;
cout << "输入4个整数(q 退出):";
while(cin >> a >> b >> c >> d) {
if(a > b) swap(a,b);
if(a > c) swap(a,c);
if(a > d) swap(a,d); // 到此,a是最小的
if(b > c) swap(b,c);
if(b > d) swap(b,b); // 到此,b是次小的
if(c > d) swap(c,d); // c次大,d最大
cout << a << "," << b << "," << c << "," << d << endl;
cout << "输入4个整数(q 退出):";
}
return 0;
}