import java.io.*;
import java.util.*;

public class Solution {

    public static void main(String[] args) {
        /* Enter your code here. Read input from STDIN. Print output to STDOUT. Your class should be named Solution. */
        Scanner lukija = new Scanner(System.in);
        
        int[] square = new int[9];
        for (int i = 0; i < square.length; i++) {
            square[i] = lukija.nextInt();
        }
        
        System.out.print(minimumCostMagic(square));        
        
    }
    

    
    public static int minimumCostMagic(int[] square) {
        int[][] magicSquares = {{8, 1, 6, 3, 5, 7, 4, 9, 2}, {4, 3, 8, 9, 5, 1, 2, 7, 6}, {2, 9, 4, 7, 5, 3, 6, 1, 8}, {6, 7, 2, 1, 5, 9, 8, 3, 4}, {6, 1, 8, 7, 5, 3, 2, 9, 4}, {8, 3, 4, 1, 5, 9, 6, 7, 2}, {4, 9, 2, 3, 5, 7, 8, 1, 6}, {2, 7, 6, 9, 5, 1, 4, 3, 8}};
        
        List<Integer> allCosts = new ArrayList<>();
        
        for (int i = 0; i < magicSquares.length; i++) {
                                   
            int cost = 0;             
             
            for (int j = 0; j < magicSquares[i].length; j++) {
                cost += Math.abs(magicSquares[i][j] - square[j]);                
            }            
            allCosts.add(cost);
        }
       
        return Collections.min(allCosts);
    }
}