using System;
using System.Collections.Generic;
using System.IO;
class Solution {
    static void Main(String[] args) {
        List<int> arr = new List<int>();
        int[,] posSolutions = {{4, 9, 2, 3, 5, 7, 8, 1, 6}, {2, 7, 6, 9, 5, 1, 4, 3, 8}, {6, 1, 8, 7, 5, 3, 2, 9, 4},
            {8, 3, 4, 1, 5, 9, 6, 7, 2}, {2, 9, 4, 7, 5, 3, 6, 1, 8}, {6, 7, 2, 1, 5, 9, 8, 3, 4},
            {8, 1, 6, 3, 5, 7, 4, 9, 2}, {4, 3, 8, 9, 5, 1, 2, 7, 6}};
        
        for(int i = 0; i < 3; i++){
            string[] arr_temp = Console.ReadLine().Split(' ');
            int[] arr2 = Array.ConvertAll(arr_temp,Int32.Parse);
            arr.AddRange(arr2);
        }
        
        int minChanges;
        int absoluteMin = Int32.MaxValue;
        
        for(int i = 0; i < 8; i++)
        {
            minChanges = 0;
            for(int j = 0; j < arr.Count; j++)
            {
                minChanges += Math.Abs(posSolutions[i,j] - arr[j]);
            }
            
            if(minChanges < absoluteMin){
                absoluteMin = minChanges;
            }
        }
        
        Console.WriteLine(absoluteMin);
    }
}