using System;

public class Program

{

    public static void Main()

    {

        int [,] a = new [,] {

            {-9, -9, -9,  1, 1, 1}, 

            {0, -9 , 0,  4, 3, 2},

            {-9, -9, 10,  1, 12, 3},

            {0,  0,  8,  6, 6, 0},

             {0,  0,  0, 10, 0, 0},

            {0,  0,  1,  2, 4, 0}};

        Console.WriteLine(CalculateHourGlass(a));

    }

    static int CalculateHourGlass(int[,] a) 

    { 

        int maxHourGlass=0;

        for (int i=0; i < 6; i++)

        {

            for (int j=0; j<6; j++)

            {

                if (i+2<6 && j+2<6)

                {

                    int hourGlass = a[i,j] + a[i,j+1] + a[i,j+2] + a[i+1,j+1] + a[i+2,j] + a[i+2,j+1] + a[i+2, j+2];

                    if (hourGlass > maxHourGlass)

                    {

                        maxHourGlass = hourGlass;

                    }

                }

            }

        }

        return maxHourGlass;

    }

}