import java.io.*;
import java.util.*;
import java.lang.Math.*;

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. */
        int[] cost = new int[8];
        int[][] matrix = new int[3][3];
        int[][][] all ={{{8,1,6},{3,5,7},{4,9,2}},
                        {{6,1,8},{7,5,3},{2,9,4}},
                        {{8,3,4},{1,5,9},{6,7,2}},
                        {{4,3,8},{9,5,1},{2,7,6}},
                        {{6,7,2},{1,5,9},{8,3,4}},
                        {{2,7,6},{9,5,1},{4,3,8}},
                        {{4,9,2},{3,5,7},{8,1,6}},
                        {{2,9,4},{7,5,3},{6,1,8}}};
        int i,j;
        Scanner s = new Scanner(System.in);
        for(i = 0;i<3;i++)
            for(j = 0;j<3;j++)
                matrix[i][j]=s.nextInt();
        for(i=0;i<8;i++)
            cost[i] = costcalc(all[i],matrix);
        Arrays.sort(cost);
        System.out.println(cost[0]);
    }
    public static int costcalc(int[][] a,int[][] b){
        int i,j,cost=0;        
        for(i = 0;i<3;i++)
            for(j = 0;j<3;j++)
                cost = cost+Math.abs(a[i][j]-b[i][j]);
         return cost;
    }
};