using System;
using System.Collections.Generic;
using System.IO;
using  System.Linq;
class Solution {
    static void Main(String[] args) {
        int n=3;
        var n1= Console.ReadLine().Split(' ');
        var n2= Console.ReadLine().Split(' ');
        var n3= Console.ReadLine().Split(' ');
        int[][] arr = new int[3][] { Array.ConvertAll(n1, s => Int32.Parse(s)), Array.ConvertAll(n2, s => Int32.Parse(s)), Array.ConvertAll(n3, s => Int32.Parse(s)) };
         int[][][] s1 = new int[8][][] { new int[3][]{ new int[] { 8, 1, 6 }, new int[] { 3, 5, 7 }, new int[] { 4, 9, 2 } }
            , new int[3][] { new int[] { 6,1,8 }, new int[] { 7,5,3 }, new int[] { 2,9,4 } }
            ,new int[3][] { new int[] { 4,9,2 }, new int[] { 3, 5, 7 }, new int[] { 8,1,6 } }
            , new int[3][] { new int[] { 2,9,4 }, new int[] { 7,5,3 }, new int[] {6,1,8 } }
            , new int[3][] { new int[] { 8, 3,4 }, new int[] { 1,5,9 }, new int[] { 6,7,2 } }
            , new int[3][] { new int[] { 4,3,8 }, new int[] { 9,5,1 }, new int[] { 2,7,6 } }
            , new int[3][] { new int[] { 6,7,2 }, new int[] { 1,5,9 }, new int[] { 8,3,4 } }
            , new int[3][] { new int[] { 2,7,6 }, new int[] { 9,5,1 }, new int[] {4,3,8 } } } ;
        
        int[] cost =new int[8];
            var index = 8;
            for (int i = 0; i < n; i++)
            {
                for (int j = 0; j < n; j++)
                {
                    for (int x = 0; x < index; x++)
                    {
                        cost[x] += Math.Abs(arr[i][j] - s1[x][i][j]);
                    }
                    

                }
            }
                    Console.WriteLine(cost.Min());

    }
}