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

public class Solution {

    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        
        int cost = 0;
        int temp_cost = -1;
        int[] square_1 = {8,1,6,3,5,7,4,9,2};
        int[] square_2 = {4,3,8,9,5,1,2,7,6};
        int[] square_3 = {2,9,4,7,5,3,6,1,8};
        int[] square_4 = {6,7,2,1,5,9,8,3,4};
        int[] square_5 = {6,1,8,7,5,3,2,9,4};
        int[] square_6 = {8,3,4,1,5,9,6,7,2};
        int[] square_7 = {4,9,2,3,5,7,8,1,6};
        int[] square_8 = {2,7,6,9,5,1,4,3,8};
        int[][] array_squares ={square_1,square_2,square_3,square_4,square_5,square_6,square_7,square_8};
        int[] square = new int[9];
        
        for(int a = 0 ; a < 9 ; a++)
           square[a] = in.nextInt();  
        
        for(int x = 0 ; x < 8 ; x++){
            for(int y = 0 ; y < 9 ; y++) {
                if(square[y]!=array_squares[x][y])
                    cost+=Math.abs(square[y]-array_squares[x][y]);
            }
        
            if(temp_cost == -1)
            temp_cost = cost;
        
            else if(cost < temp_cost)
            temp_cost = cost;
        
            cost = 0;
        }
        
        cost = temp_cost;
       System.out.println(cost);
        
    }
}