#include <bits/stdc++.h>
using namespace std;
#ifdef LOCAL
  #include "settings/debug.cpp"
  #define _GLIBCXX_DEBUG
#else
  #define Debug(...) void(0)
#endif
using ll = long long;
#define rep(i, n) for (int i = 0; i < (n); ++i)

int main() {
  ll a, b, c, d;
  cin >> a >> b >> c >> d;
  complex<ll> x = { a, b }, y = { c, d };
  complex z = x * y;
  cout << z.real() << " " << z.imag() << endl;
  return 0;
}