#include <cmath>
#include <climits>
#include <cstdio>
#include <vector>
#include <iostream>
#include <algorithm>
using namespace std;


int main() {
    int Magic[8][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};
    int Matrix[3][3];
    int _min = INT_MAX;
    for(int i = 0; i < 3; i++)
        for(int j  = 0; j < 3; j++)
         cin>>Matrix[i][j];
    
        for(int k = 0; k < 8; k++){
            int temp = 0;
            for(int i = 0; i < 3; i++){
                for(int j =0; j < 3; j++){
                    temp += abs(Magic[k][i][j] - Matrix[i][j]);
                }
            }
        _min = min(_min, temp);           
    }
    cout<<_min<<endl;
    return 0;
}