using System;

using System.Linq;

using System.Collections.Generic;

public class Program

{   

    public static List<List<int>> MatMultiplication(List<List<int>> A, List<List<int>> B)

    {

        int source_RowCount = A.Count; int source_ColCount = A[0].Count;

        List<List<int>> MatMulList = new List<List<int>>(source_RowCount);

        Console.WriteLine("The Source Row Count: " + source_RowCount);

        Console.WriteLine("The Source Column Count: " + source_ColCount);

        for(var i = 0; i < source_RowCount; i++)

        {

            List<int> subList = new List<int>(source_ColCount);

            for(var j = 0; j < source_ColCount; j++)

            {

                int tmpSub = A[i][j] - B[i][j];

                subList.Add(tmpSub);

            }

            MatMulList.Add(subList);

        }

        return MatMulList;

    }

    public static void Main()

    {

        /*List<int> numbers = Console.ReadLine().Split(new Char[] {' '}, StringSplitOptions.RemoveEmptyEntries).Select(item => int.Parse(item)).ToList();

        int arrSize = Convert.ToInt32(numbers[0]);

        numbers = numbers.Skip(1).ToList();

        Console.WriteLine(String.Join(" ", numbers));*/

        List<List<int>> SourceMatrix = new List<List<int>>() 

        {

            new List<int> { 1, 2 },

            new List<int> { 3, 4 }

        };

        List<List<int>> destMatrix = new List<List<int>>() 

        {

            new List<int> { 5, 6 },

            new List<int> { 7, 8 }

        };

        var xyz = Program.MatMultiplication(SourceMatrix, destMatrix);

        for(var z = 0; z < xyz.Count; z++)

        {

            Console.WriteLine(string.Join(" ", xyz[z]));

        }

    }

}