using System;
using System.Collections.Generic;
using System.IO;
class Solution {
    static void Main(String[] args) {

        int[] digits = new int[9];
        int[][] squares = new int[][] {
            new int[] {6, 1, 8, 7, 5, 3, 2, 9, 4},
            new int[] {8, 1, 6, 3, 5, 7, 4, 9, 2},
            new int[] {8, 3, 4, 1, 5, 9, 6, 7, 2},
            new int[] {6, 7, 2, 1, 5, 9, 8, 3, 4},
            new int[] {2, 7, 6, 9, 5, 1, 4, 3, 8},
            new int[] {4, 3, 8, 9, 5, 1, 2, 7, 6},
            new int[] {4, 9, 2, 3, 5, 7, 8, 1, 6},
            new int[] {2, 9, 4, 7, 5, 3, 6, 1, 8}
        };
        int k = 0;
        for (int i = 0; i < 3; i++){
            int[] n1 = Array.ConvertAll(Console.ReadLine().Split(' '), int.Parse);
            for (int j = 0; j < 3; j++, k++){
                digits[k]=(n1[j]);
            }
        }  
        int minchange = 100;
        for (int i1 = 0; i1 < 8; i1++){
            int change = 0;
            for (int i2 = 0; i2 < 9; i2++){
                change+= (digits[i2] - squares[i1][i2] > 0 ? (digits[i2] - squares[i1][i2]) : (squares[i1][i2]-digits[i2]));
            }
            if (minchange > change)
                minchange = change;
        }
        Console.WriteLine(minchange);

    }
}