using System;
using System.Collections.Generic;
using System.IO;
class Solution {
    static void Main(String[] args) {
        int[] row0 = Array.ConvertAll(Console.ReadLine().Split(' '),Int32.Parse);
        int[] row1 = Array.ConvertAll(Console.ReadLine().Split(' '),Int32.Parse);
        int[] row2 = Array.ConvertAll(Console.ReadLine().Split(' '),Int32.Parse);
        int diff=Math.Abs(row0[0]-4)+Math.Abs(row0[1]-9)+Math.Abs(row0[2]-2)+
                  Math.Abs(row1[0]-3)+Math.Abs(row1[1]-5)+Math.Abs(row1[2]-7)+
                  Math.Abs(row2[0]-8)+Math.Abs(row2[1]-1)+Math.Abs(row2[2]-6);
        int min=diff;
        diff=Math.Abs(row0[0]-2)+Math.Abs(row0[1]-7)+Math.Abs(row0[2]-6)+
             Math.Abs(row1[0]-9)+Math.Abs(row1[1]-5)+Math.Abs(row1[2]-1)+
             Math.Abs(row2[0]-4)+Math.Abs(row2[1]-3)+Math.Abs(row2[2]-8);
        if(diff<min){
            min=diff;
        }
        diff=Math.Abs(row0[0]-6)+Math.Abs(row0[1]-1)+Math.Abs(row0[2]-8)+
             Math.Abs(row1[0]-7)+Math.Abs(row1[1]-5)+Math.Abs(row1[2]-3)+
             Math.Abs(row2[0]-2)+Math.Abs(row2[1]-9)+Math.Abs(row2[2]-4);
        if(diff<min){
            min=diff;
        }
        diff=Math.Abs(row0[0]-8)+Math.Abs(row0[1]-3)+Math.Abs(row0[2]-4)+
             Math.Abs(row1[0]-1)+Math.Abs(row1[1]-5)+Math.Abs(row1[2]-9)+
             Math.Abs(row2[0]-6)+Math.Abs(row2[1]-7)+Math.Abs(row2[2]-2);
        if(diff<min){
            min=diff;
        }
        diff=Math.Abs(row2[0]-4)+Math.Abs(row2[1]-9)+Math.Abs(row2[2]-2)+
                  Math.Abs(row1[0]-3)+Math.Abs(row1[1]-5)+Math.Abs(row1[2]-7)+
                  Math.Abs(row0[0]-8)+Math.Abs(row0[1]-1)+Math.Abs(row0[2]-6);
        if(diff<min){
            min=diff;
        }
        diff=Math.Abs(row2[0]-2)+Math.Abs(row2[1]-7)+Math.Abs(row2[2]-6)+
             Math.Abs(row1[0]-9)+Math.Abs(row1[1]-5)+Math.Abs(row1[2]-1)+
             Math.Abs(row0[0]-4)+Math.Abs(row0[1]-3)+Math.Abs(row0[2]-8);
        if(diff<min){
            min=diff;
        }
        diff=Math.Abs(row2[0]-6)+Math.Abs(row2[1]-1)+Math.Abs(row2[2]-8)+
             Math.Abs(row1[0]-7)+Math.Abs(row1[1]-5)+Math.Abs(row1[2]-3)+
             Math.Abs(row0[0]-2)+Math.Abs(row0[1]-9)+Math.Abs(row0[2]-4);
        if(diff<min){
            min=diff;
        }
        diff=Math.Abs(row2[0]-8)+Math.Abs(row2[1]-3)+Math.Abs(row2[2]-4)+
             Math.Abs(row1[0]-1)+Math.Abs(row1[1]-5)+Math.Abs(row1[2]-9)+
             Math.Abs(row0[0]-6)+Math.Abs(row0[1]-7)+Math.Abs(row0[2]-2);
        if(diff<min){
            min=diff;
        }
        Console.WriteLine(min);
    }
}