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

int main(void)
{
    long long a,b,c,d;
    cin >> a >> b >> c >> d;
    complex<long long> z1(a,b);
    complex<long long> z2(c,d);
    complex<long long> ans=z1*z2;
    cout << ans.real() << " " << ans.imag() << endl;
    return 0;
}