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

public class Solution {

    public static void main(String[] args) {
        int array[][] = new int[3][3];
        int M1[][] = {{8,1,6},{3,5,7},{4,9,2}};
        int M2[][] = {{4,9,2},{3,5,7},{8,1,6}};
        int M3[][] = {{4,3,8},{9,5,1},{2,7,6}};
        int M4[][]={{6,1,8},{7,5,3},{2,9,4}};
        int M5[][]={{2,9,4,},{7,5,3},{6,1,8}};
        int M6[][]= { {2,7,6},{9,5,1},{4,3,8}};
        int M7[][]= {{6,7,2},{1,5,9},{8,3,4}};
        int M8[][]={{8,3,4},{1,5,9},{6,7,2}};
        int cost[] = {0,0,0,0,0,0,0,0};
        Scanner sc = new Scanner(System.in);
        for(int i=0;i<3;i++ ){
            for( int j=0;j<3 ;j++){
                array[i][j]= sc.nextInt();
            }
        }
        for(int i=0;i<3;i++ ){
            for( int j=0;j<3 ;j++){
                if(M1[i][j] != array[i][j]){
                    cost[0]+=abs(M1[i][j]-array[i][j]);
                }
            }
        }
        for(int i=0;i<3;i++ ){
            for( int j=0;j<3 ;j++){
                if(M2[i][j] != array[i][j]){
                    cost[1]+=abs(M2[i][j]-array[i][j]);
                }
            }
        }
        for(int i=0;i<3;i++ ){
            for( int j=0;j<3 ;j++){
                if(M3[i][j] != array[i][j]){
                    cost[2]+=abs(M3[i][j]-array[i][j]);
                }
            }
        }
        for(int i=0;i<3;i++ ){
            for( int j=0;j<3 ;j++){
                if(M4[i][j] != array[i][j]){
                    cost[3]+=abs(M4[i][j]-array[i][j]);
                }
            }
        }
        for(int i=0;i<3;i++ ){
            for( int j=0;j<3 ;j++){
                if(M5[i][j] != array[i][j]){
                    cost[4]+=abs(M5[i][j]-array[i][j]);
                }
            }
        }
        for(int i=0;i<3;i++ ){
            for( int j=0;j<3 ;j++){
                if(M6[i][j] != array[i][j]){
                    cost[5]+=abs(M6[i][j]-array[i][j]);
                }
            }
        }
        for(int i=0;i<3;i++ ){
            for( int j=0;j<3 ;j++){
                if(M7[i][j] != array[i][j]){
                    cost[6]+=abs(M7[i][j]-array[i][j]);
                }
            }
        }
            for(int i=0;i<3;i++ ){
            for( int j=0;j<3 ;j++){
                if(M8[i][j] != array[i][j]){
                    cost[7]+=abs(M8[i][j]-array[i][j]);
                }
            }
        }
        Arrays.sort(cost);
    System.out.println(cost[0]);
        /* Enter your code here. Read input from STDIN. Print output to STDOUT. Your class should be named Solution. */
    }
}