using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;

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> iMatrix = new List<int>(9);
            for(int i = 0; i < 3; i++) {
                    iMatrix.AddRange(Array.ConvertAll(Console.ReadLine().Split(' '),Int32.Parse));
            }
            MagicSquare sq = new MagicSquare();
            Console.WriteLine(sq.cheapestSquareConv(iMatrix.ToArray()));
    }
}
    class MagicSquare {
        int[][] sqArr = new int[][] {
         new int[] { 2, 7, 6, 9, 5, 1, 4, 3, 8 },
         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, 9, 2, 3, 5, 7, 8, 1, 6 },
         new int[] { 8, 3, 4, 1, 5, 9, 6, 7, 2 },
         new int[] { 4, 3, 8, 9, 5, 1, 2, 7, 6 },
         new int[] { 6, 7, 2, 1, 5, 9, 8, 3, 4 },
         new int[] { 2, 9, 4, 7, 5, 3, 6, 1, 8 }
            };
        int[] costs = new int[8];
        public int cheapestSquareConv(int[] inMatrix) {
            int intSq = 0;
            foreach(int[] magic in sqArr) {
                for(int i = 0; i < 9; i++) {
                    costs[intSq] += Math.Abs(magic[i] - inMatrix[i]);
                }
                intSq++;
            }
            int smallestCost = costs.Min();
            return smallestCost;
        }
    }