#include "iostream"using namespace std;int main(){int x, y, x1, x2, y1, y2;while (cin >> x >> y && (x || y)){x1 = x2 = x;y1 = y2 = y;while (cin >> x >> y && (x || y)){x1 = x > x1 ? x1 : x;y1 = y > y1 ? y1 : y;x2 = x > x2 ? x : x2;y2 = y > y2 ? y : y2;}cout << x1 << " " << y1<< " " << x2 << " " << y2 << endl;}}
