/* -*- coding: utf-8 -*-
 *
 * 2400.cc:  No.2400 Product of Gaussian Integer - yukicoder
 */

#include<cstdio>
#include<algorithm>
 
using namespace std;

/* constant */

/* typedef */

typedef long long ll;

/* global variables */

/* subroutines */

/* main */

int main() {
  ll a, b, c, d;
  scanf("%lld%lld%lld%lld", &a, &b, &c, &d);

  // (a+bi)(c+di)=(ac-bd)+(ad+bc)i

  printf("%lld %lld\n", a * c - b * d, a * d + b * c);

  return 0;
}