using System;
using System.Collections.Generic;
using System.IO;
class Solution {
    
    /*
    There are only 8 distinct magic squares of size 3x3.
    Also, magic squares have 2 properties:
    Center of magic square of size 3x3 is always 5.
    No corner cell can contain an odd integer.
    */
    
    private static int ComputeCost(int[] inputArr, int[] checkArr){
        int cost = 0;
        
        for (int i = 0; i < 9; i++){
            cost += Math.Abs(inputArr[i] - checkArr[i]);
        }
        
        return cost;
    }
    
    private static int[] GetSolutionArray(int solutionArray){
    
        int[] sol0 = {2,9,4,
                      7,5,3,
                      6,1,8};
        
        int[] sol1 = {2,7,6,
                      9,5,1,
                      4,3,8};
        
        int[] sol2 = {4,9,2,
                      3,5,7,
                      8,1,6};
        
        int[] sol3 = {8,3,4,
                      1,5,9,
                      6,7,2};        
        
        int[] sol4 = {6,1,8,
                      7,5,3,
                      2,9,4};
        
        int[] sol5 = {6,7,2,
                      1,5,9,
                      8,3,4};
        
        int[] sol6 = {4,3,8,
                      9,5,1,
                      2,7,6};
        
        int[] sol7 = {8,1,6,
                      3,5,7,
                      4,9,2};
        
        switch (solutionArray){        
            case 0:    
            return sol0;
            
            case 1:    
            return sol1;
            
            case 2:    
            return sol2;
            
            case 3:    
            return sol3;
            
            case 4:    
            return sol4;
            
            case 5:    
            return sol5;
            
            case 6:    
            return sol6;
            
            case 7:    
            return sol7;
            
            default:
            return null;
        }            
    }
    
    
    static void Main(String[] args) {
        /* Enter your code here. Read input from STDIN. Print output to STDOUT. Your class should be named Solution */
        string[] arr_temp = Console.ReadLine().Split(' ');
        
        int[] row1Arr = Array.ConvertAll(arr_temp,Int32.Parse);
        
        arr_temp = Console.ReadLine().Split(' ');
        int[] row2Arr = Array.ConvertAll(arr_temp,Int32.Parse);
        
        arr_temp = Console.ReadLine().Split(' ');
        int[] row3Arr = Array.ConvertAll(arr_temp,Int32.Parse);
        
        int[] inputArr = new int[9];
        
        for (int i = 0; i < 3; i++){
            for (int j = 0; j < 3; j++){
                if (i == 0)
                    inputArr[i*3 + j] = row1Arr[j];
                
                if (i == 1)
                    inputArr[i*3 + j] = row2Arr[j];
                
                if (i == 2)
                    inputArr[i*3 + j] = row3Arr[j];                    
            }            
        }
        
        int cost = 999;
        
        for (int i = 0; i < 8; i++){
            int [] solArr = GetSolutionArray(i);
            int tempCost = ComputeCost(inputArr, solArr);
            
            if (tempCost < cost)
                cost = tempCost;    
            
            
        }
        
        Console.Write(cost.ToString());
    }
}