using System;
using System.Linq;

class Program
{
    static void Main()
    {
        int sumTop = 0;
        int sumBot = 0;
        int sumSums = 0;
        int maxHourGlass = int.MinValue;

        int[][] matrix = new int[6][];

        //Read the matrix
        byte rows = 6;
        byte cols = 6;
        for (byte i = 0; i < rows; i++)
        {
            matrix[i] = Console.ReadLine().Split().Select(int.Parse).ToArray();
        }

        //Scan the matrix's hourglasses and sum:
        for (byte i = 1; i < rows - 1; i++)
        {
            for (byte j = 1; j < cols - 1; j++)
            {
                sumTop = matrix[i - 1][j - 1] + matrix[i - 1][j] + matrix[i - 1][j + 1];
                sumBot = matrix[i + 1][j - 1] + matrix[i + 1][j] + matrix[i + 1][j + 1];
                sumSums = sumTop + matrix[i][j] + sumBot;

                if (sumSums > maxHourGlass)
                {
                    maxHourGlass = sumSums;
                }
            }
        }
        Console.WriteLine(maxHourGlass);
    }
}