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 */
        List<int> lst = new List<int>();
        lst.AddRange(Array.ConvertAll(Console.ReadLine().Split(' '), int.Parse));
        lst.AddRange(Array.ConvertAll(Console.ReadLine().Split(' '), int.Parse));
        lst.AddRange(Array.ConvertAll(Console.ReadLine().Split(' '), int.Parse));
        Console.WriteLine(GetMagicCost(lst.ToArray()));
    }
    
    static int GetMagicCost(int[] arr)
        {
            List<int[]> magicSquares = new List<int[]>()
            {
                new int[] {8,1,6,3,5,7,4,9,2},
                new int[] {6,1,8,7,5,3,2,9,4},
                new int[] {4,3,8,9,5,1,2,7,6},
                new int[] {2,7,6,9,5,1,4,3,8},
                new int[] {2,9,4,7,5,3,6,1,8},
                new int[] {4,9,2,3,5,7,8,1,6},
                new int[] {6,7,2,1,5,9,8,3,4},
                new int[] {8,3,4,1,5,9,6,7,2},
            };

            int max = int.MaxValue;

            foreach (var item in magicSquares)
            {
                int cost = 0;
                for (int i = 0; i < 9; i++)
                {
                    cost += Math.Abs(arr[i] - item[i]);   
                }
                if (cost == 0)
                {
                    return 0;
                }
                if (cost < max)
                {
                    max = cost;
                }
            }
            return max;
        }
}