#include <stdio.h>
#include <string.h>
#include <math.h>
#include <stdlib.h>

int main() {

    /* Enter your code here. Read input from STDIN. Print output to STDOUT */
    int magic[8][3][3]={{{8,1,6},{3,5,7},{4,9,2}} ,
                        {{8,3,4},{1,5,9},{6,7,2}} ,
                        {{4,9,2},{3,5,7},{8,1,6}} ,
                        {{4,3,8},{9,5,1},{2,7,6}} ,
                        {{6,1,8},{7,5,3},{2,9,4}} ,
                        {{6,7,2},{1,5,9},{8,3,4}} ,
                        {{2,9,4},{7,5,3},{6,1,8}} ,
                        {{2,7,6},{9,5,1},{4,3,8}} };
    int square[3][3];
    int sum = 0;
    int cost[8];
    int min_cost = 56;
    for(int i = 0; i < 3; i++){
        for(int j = 0; j < 3; j++){
            scanf("%d",&square[i][j]);
        }
    }
    for(int i = 0; i < 8; i++){
        cost[i] = 0;
        for(int j = 0; j < 3; j++){
            for(int k = 0; k < 3; k++){
                cost[i] += abs(magic[i][j][k]-square[j][k]);
            }
        }
        if(cost[i]<min_cost){
            min_cost = cost[i];
        }
    } 
    printf("%d ",min_cost);
    return 0;
}