#include <bits/stdc++.h>
using namespace std;

int main() {
	long long a, b, c, d;
	cin >> a >> b >> c >> d;
	complex<long long> c1( a, b ), c2( c, d ), c3;
	c3 = c1 * c2;
	cout << c3.real() << " " << c3.imag() << endl;
}