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[,,] matrixCombination = new int[,,] {{{8,1,6},{3,5,7},{4,9,2}},{{6,1,8},{7,5,3},{2,9,4}},
                                    {{4,9,2},{3,5,7},{8,1,6}},{{2,9,4},{7,5,3},{6,1,8}},
                                    {{8,3,4},{1,5,9},{6,7,2}},{{4,3,8},{9,5,1},{2,7,6}},
                                    {{6,7,2},{1,5,9},{8,3,4}},{{2,7,6},{9,5,1},{4,3,8}}};
            int[][] inputMatrix = new int[3][];
            inputMatrix[0] = Array.ConvertAll(Console.ReadLine().Split(' '),int.Parse);
            inputMatrix[1] = Array.ConvertAll(Console.ReadLine().Split(' '), int.Parse);
            inputMatrix[2] = Array.ConvertAll(Console.ReadLine().Split(' '), int.Parse);
            int minDiff = int.MaxValue;
            for (int i = 0; i < 8; i++){
                int diff = 0;
                for (int j = 0; j < 3; j++){
                    for (int k = 0; k < 3; k++){
                        diff += Math.Abs(matrixCombination[i, j, k] - inputMatrix[j][k]);
                    }
                }
                if (diff < minDiff){
                    minDiff = diff;
                }
            }
            Console.WriteLine(minDiff);
    }
}