#include <iostream>
using namespace std;

struct Vector {
    double x;
    double y;
    Vector ()
     {
     	x = 0;
     	y = 0;
	 }
    Vector (double _x, double _y){
        x = _x;
        y = _y;
    }
    void printVector(){
        cout << x << " "<< y;
    }
};

Vector addVector(Vector v1, Vector v2)
{
    // Them code cua ban o day
    Vector a;
    a.x = v1.x + v2.x;
    a.y = v1.y + v2.y;
    return a;
}

int main()
{
    Vector v1, v2;
    cin>> v1.x>> v1.y>> v2.x>> v2.y;
    Vector a = addVector ( v1, v2);
    Vector ( a.x, a.y);
    a.printVector();
    return 0;
}