using System;

class Program
{
    static void Main()
    {
        string[] p = Console.ReadLine().Split();
        string[] q = Console.ReadLine().Split();

        long A = long.Parse(p[0]);
        long B = long.Parse(p[1]);
        long C = long.Parse(q[0]);
        long D = long.Parse(q[1]);

        // (A+Bi)(C+Di) = (AC - BD) + (AD + BC)i
        long N = A * C - B * D;
        long M = A * D + B * C;

        Console.WriteLine($"{N} {M}");
    }
}