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 */
        
        var m1 = "8 1 6 3 5 7 4 9 2";
        var m2 = "4 3 8 9 5 1 2 7 6";
        var m3 = "2 9 4 7 5 3 6 1 8";
        var m4 = "6 7 2 1 5 9 8 3 4";
        var m5 = "6 1 8 7 5 3 2 9 4";
        var m6 = "8 3 4 1 5 9 6 7 2";
        var m7 = "4 9 2 3 5 7 8 1 6";
        var m8 = "2 7 6 9 5 1 4 3 8";
        
        var l = Console.ReadLine() + " " + Console.ReadLine() + " " + Console.ReadLine();
        
        var min = GetDiff(m1, l);
        var r = GetDiff(m2, l);
        if (r < min)
            min = r;
        r = GetDiff(m3, l);
        if (r < min)
            min = r;
        r = GetDiff(m4, l);
        if (r < min)
            min = r;
        r = GetDiff(m5, l);
        if (r < min)
            min = r;
        r = GetDiff(m6, l);
        if (r < min)
            min = r;
        r = GetDiff(m7, l);
        if (r < min)
            min = r;
        r = GetDiff(m8, l);
        if (r < min)
            min = r;
        
        Console.WriteLine(min);
    }
    
    static int GetDiff(string s1, string s2)
    {
        var res = 0;
        for (int i = 0; i < s1.Length; i++)
            if (s1[i] != s2[i])
                res += Math.Abs(int.Parse(s1[i] + "") - int.Parse(s2[i] + ""));
        return res;
    }
}