using System;
using System.Collections.Generic;

class Solution 
{
    static void Main(String[] args) 
    {
        int[,] square = new int[3, 3];
        
        for (int j = 0; j < 3; j++)
        {
            int[] row = Array.ConvertAll(Console.ReadLine().Split(' '), int.Parse);
            
            for (int i = 0; i < 3; i++)
            {
                square[i, j] = row[i];
            }
        }
        
        Console.WriteLine(CostToMakeMagical(square));
    }
    
    static int CostToMakeMagical(int[,] square)
    {
        int minimumCost = -1;

        foreach (int[,] magicSquare in GenerateMagicSquares())
        {
            int currentCost = 0;

            for (int j = 0; j < 3; j++)
            {
                for (int i = 0; i < 3; i++)
                {
                    currentCost += Math.Abs(square[i, j] - magicSquare[i, j]);
                }
            }

            if (minimumCost == -1 || currentCost < minimumCost)
            {
                minimumCost = currentCost;
            }
        }

        return minimumCost;
    }
    
    static List<int[,]> GenerateMagicSquares()
    {
        List<int[,]> magicSquares = new List<int[,]>();

        for (int i = 2; i <= 8; i += 2)
        {
            for (int j = 2; j <= 8; j += 2)
            {
                if (i == j || 15 - i - j == 5) continue;

                int[,] magicSquare = new int[3, 3];

                magicSquare[0, 0] = i;
                magicSquare[1, 0] = 15 - i - j;
                magicSquare[2, 0] = j;
                magicSquare[1, 1] = 5;
                magicSquare[1, 2] = 10 - magicSquare[1, 0];
                magicSquare[0, 2] = 10 - magicSquare[2, 0];
                magicSquare[0, 1] = 15 - magicSquare[0, 0] - magicSquare[0, 2];
                magicSquare[2, 2] = 10 - magicSquare[0, 0];
                magicSquare[2, 1] = 10 - magicSquare[0, 1];

                magicSquares.Add(magicSquare);
            }
        }

        return magicSquares;
    }
}