import java.io.*;
import java.util.*;
import java.text.*;
import java.math.*;
import java.util.regex.*;

public class Solution {
    static int[][] mat = new int[3][3]; 
    static int[][] ms1 = {{8,1,6},{3,5,7},{4,9,2}};
    static int[][] ms2 = {{6,1,8},{7,5,3},{2,9,4}};
    static int[][] ms3 = {{4,9,2},{3,5,7},{8,1,6}};
    static int[][] ms4 = {{2,9,4},{7,5,3},{6,1,8}};
    static int[][] ms5 = {{8,3,4},{1,5,9},{6,7,2}};
    static int[][] ms6 = {{4,3,8},{9,5,1},{2,7,6}};
    static int[][] ms7 = {{6,7,2},{1,5,9},{8,3,4}};
    static int[][] ms8 = {{2,7,6},{9,5,1},{4,3,8}};
    static int thecost(int[][] current,int[][] ref){
        int c=0; 
        for (int i=0;i<3;i++){
            for (int j=0;j<3;j++){
                c += Math.abs(current[i][j]-ref[i][j]);
            }
        }
        return c;
    }    

    public static void main(String[] args) {       
        Scanner scan = new Scanner(System.in);               
        for (int i=0;i<3;i++){
            for (int j=0;j<3;j++){
                mat[i][j]=scan.nextInt();
            }
            if (i<2) scan.nextLine();    
        }
        int minCost = 2147483647;
        int[] costs = new int[8]; 
        costs[0]=thecost(mat,ms1);
        costs[1]=thecost(mat,ms2);
        costs[2]=thecost(mat,ms3);
        costs[3]=thecost(mat,ms4);
        costs[4]=thecost(mat,ms5);
        costs[5]=thecost(mat,ms6);
        costs[6]=thecost(mat,ms7);
        costs[7]=thecost(mat,ms8);
        for (int i=0; i<8; i++)
            if (costs[i]<minCost)
                minCost = costs[i];
        System.out.println(minCost);        
    }
}