using System;
using System.Collections.Generic;
using System.IO;
class Solution 
{
    static void Main(String[] args) 
    {       
        var matrix = new int[3,3];
        for(int i = 0; i < 3; ++i)
        {
            var list = Array.ConvertAll(Console.ReadLine().Split(' '), int.Parse);
            for(int k = 0; k < 3; ++k)
            {
                matrix[i,k] = list[k];
            }
        }              
        
        var corner = new int[]{2, 4, 6, 8 };
        
        var sample = new int[3,3];
        sample[1,1] = 5;
        int minDiff = int.MaxValue;
        
        for(int i = 0 ; i < corner.Length; ++i)
        {
            int diff = Math.Abs(corner[i] - 5);
            
            for(int k = 0; k < 2; ++k)
            {               
                sample[0,0] = corner[i];
                sample[2,2] = 10 - sample[0,0];
                if(diff == 1)
                {
                    sample[0, 2] =  k == 0 ? 8 : 2;
                }
                else
                {
                    sample[0, 2] =  k == 0 ? 4 : 6;
                }
                
                sample[0,1] = 15 - sample[0,0] - sample[0,2];
                sample[2,1] = 15 - sample[1,1] - sample[0,1];
                sample[2,0] = 15 - sample[2,1] - sample[2,2];
                
                sample[1,0] = 15 - sample[0,0] - sample[2,0];
                sample[1,2] = 15 - sample[1,1] - sample[1,0];                                               
                
                    
                int change = 0;
                for(int y = 0; y < 3; ++y)
                {
                    for(int x = 0; x < 3; ++x)
                    {
                        change += Math.Abs(matrix[y,x] - sample[y,x]);
                    }
                }
                
                minDiff = Math.Min(change, minDiff);
            }                   
        }
        
        Console.WriteLine(minDiff);
        
     
    }
        
                       
}