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 scan = new Scanner(System.in);
        int[][] square =  new int[3][3];
        for(int i = 0; i < 3; i++){
            String[] elements = scan.nextLine().split(" ");
            for(int j = 0; j < 3; j++){
                square[i][j] = Integer.parseInt(elements[j]);
            }
        }
        scan.close();
        
        int[] magic;
        int lowestCost;
        
        magic = new int[] {4,9,2,3,5,7,8,1,6};
        lowestCost = Math.abs(magic[0]-square[0][0]) + Math.abs(magic[1]-square[0][1]) + Math.abs(magic[2]-square[0][2]) + Math.abs(magic[3]-square[1][0]) + Math.abs(magic[4]-square[1][1]) + Math.abs(magic[5]-square[1][2]) + Math.abs(magic[6]-square[2][0]) + Math.abs(magic[7]-square[2][1]) + Math.abs(magic[8]-square[2][2]);
        
        for(int i = 0; i < 7; i++){
            if(i == 0){
                magic = new int[] {2,7,6,9,5,1,4,3,8};
            }else if(i == 1){
                magic = new int[] {6,1,8,7,5,3,2,9,4};
            }else if(i == 2){
                magic = new int[] {8,3,4,1,5,9,6,7,2};
            }else if(i == 3){
                magic = new int[] {2,9,4,7,5,3,6,1,8};
            }else if(i == 4){
                magic = new int[] {6,7,2,1,5,9,8,3,4};
            }else if(i == 5){
                magic = new int[] {8,1,6,3,5,7,4,9,2};
            }else if(i == 6){
                magic = new int[] {4,3,8,9,5,1,2,7,6};
            }
            int cost = Math.abs(magic[0]-square[0][0]) + Math.abs(magic[1]-square[0][1]) + Math.abs(magic[2]-square[0][2]) + Math.abs(magic[3]-square[1][0]) + Math.abs(magic[4]-square[1][1]) + Math.abs(magic[5]-square[1][2]) + Math.abs(magic[6]-square[2][0]) + Math.abs(magic[7]-square[2][1]) + Math.abs(magic[8]-square[2][2]);
            if(cost < lowestCost){
                lowestCost = cost;
            }
        }
        
        System.out.print(lowestCost);
    }
}