#include <cmath>
#include <iostream>
#include<limits.h>
using namespace std;


int main() {
    
    long magicSquare[][3][3] = {{{8,1,6}, {3,5,7}, {4,9,2}}, {{6,1,8}, {7,5,3}, {2,9,4}}, {{4,3,8}, {9,5,1}, {2,7,6}},
    {{2,7,6},{9,5,1},{4,3,8}}, {{2,9,4},{7,5,3},{6,1,8}}, {{4,9,2},{3,5,7},{8,1,6}},
                            {{6,7,2},{1,5,9},{8,3,4}}, {{8,3,4},{1,5,9},{6,7,2}}};
    long inputMatrix[3][3], total;
    long tempTotal = 0;
    total = LONG_MAX;
    for(int i = 0; i < 3; i++)
        for(int j = 0; j < 3; j++)
            cin >> inputMatrix[i][j];
    
    for(int k = 0; k < 8; k++){
        tempTotal = 0;
        for(int i = 0; i < 3; i++){
            for(int j = 0; j < 3; j++){
                tempTotal += abs(magicSquare[k][i][j] - inputMatrix[i][j]);
            }
        }
        if(tempTotal < total)
            total = tempTotal;
    }
    
    cout << total;
    
    return 0;
}