Matrix Max Sum

using System;
using System.Collections.Generic;
using System.Globalization;
using System.Linq;



namespace Orders
{
    class Program
    {
        static void Main(string[] args)
        {
			int[] number = Console.ReadLine().Split(" ").Select(int.Parse).ToArray();

			int row = number[0];
			int col = number[1];
			var matrix = new int[row, col];
			for(int i = 0; i < row; i++)
			{
				 int[] rows = Console.ReadLine().Split(" ", StringSplitOptions.RemoveEmptyEntries).Select(int.Parse).ToArray();


				for(int j = 0; j < col; j++)
				{
					matrix[i, j] = rows[j];

				}
			}

			int sum = int.MinValue;
			int indexR = -1;
			int indexC = -1;

		   for(int i = 0; i < row - 2; i++)
		   {
		   	for(int j = 0; j < col - 2; j++)
			   {
			   	int sums = matrix[i, j] + matrix[i, j + 1] + matrix[i + 1, j] + matrix[i + 1, j + 1] + matrix[i, j + 2] + matrix[i + 1, j + 2] + matrix[i + 2, j] + matrix[i + 2, j + 1] + matrix[i + 2, j + 2];
				   if(sums > sum)
				   {
				   	sum = sums;
					   indexR = i;
					   indexC = j;
				   }


			   }



		   }

		   Console.WriteLine($"Sum = {sum}");
		  Console.WriteLine($"{matrix[indexR, indexC]} {matrix[indexR, indexC + 1]} {matrix[indexR, indexC + 2]}");
		  Console.WriteLine($"{matrix[indexR + 1, indexC]} {matrix[indexR + 1, indexC + 1]} {matrix[indexR + 1, indexC + 2]}");
		  Console.WriteLine($"{matrix[indexR + 2, indexC]} {matrix[indexR + 2, indexC + 1]} {matrix[indexR + 2, indexC + 2]}");


		}
	}
}