using System;
using System.Collections.Generic;
using System.IO;
class Solution
{
    static void Main(String[] args)
    {
        /* Enter your code here. Read input from STDIN. Print output to STDOUT. Your class should be named Solution */
        int result = Int32.MaxValue;
        int[] magicMatrix = new int[9];
        int s_index = 0;
        for (int arr_i = 0; arr_i < 3; arr_i++)
        {
            string[] arr_temp = Console.ReadLine().Split(' ');

            foreach (string s in arr_temp)
            {
                magicMatrix[s_index] = Convert.ToInt32(s);
                s_index++;
            }
            //magicMatrix[arr_i] = Array.ConvertAll(arr_temp, Int32.Parse);
        }

        int[][] magicCombo = new int[8][];
        magicCombo[0] = new int[9] { 8, 1, 6, 3, 5, 7, 4, 9, 2 };
        magicCombo[1] = new int[9] { 6, 1, 8, 7, 5, 3, 2, 9, 4 };
        magicCombo[2] = new int[9] { 4, 9, 2, 3, 5, 7, 8, 1, 6 };
        magicCombo[3] = new int[9] { 2, 9, 4, 7, 5, 3, 6, 1, 8 };
        magicCombo[4] = new int[9] { 8, 3, 4, 1, 5, 9, 6, 7, 2 };
        magicCombo[5] = new int[9] { 4, 3, 8, 9, 5, 1, 2, 7, 6 };
        magicCombo[6] = new int[9] { 6, 7, 2, 1, 5, 9, 8, 3, 4 };
        magicCombo[7] = new int[9] { 2, 7, 6, 9, 5, 1, 4, 3, 8 };


        for (int i = 0; i < 8; i++)
        {
            int cc = 0;
            for (int j = 0; j < 9; j++)
            {
                cc = cc + Math.Abs(magicCombo[i][j] - magicMatrix[j]);
            }

            if (result > cc)
            {
                result = cc;
            }
        }

        if (result == Int32.MaxValue)
        {
            result = 0;
        }
        Console.WriteLine(result);
    }
}