#include <iostream>
#include <cmath>

using namespace std;

int main() {
    int sq[8][9] =
    {{8, 1, 6, 3, 5, 7, 4, 9, 2},
    {2, 9, 4, 7, 5, 3, 6, 1, 8},
    {8, 3, 4, 1, 5, 9, 6, 7, 2},
    {2, 7, 6, 9, 5, 1, 4, 3, 8},
    {4, 3, 8, 9, 5, 1, 2, 7, 6},
    {6, 7, 2, 1, 5, 9, 8, 3, 4},
    {4, 9, 2, 3, 5, 7, 8, 1, 6},
    {6, 1, 8, 7, 5, 3, 2, 9, 4}};

    int n[3][3];

    for (int i = 0; i < 3; i++) {
        for (int j = 0; j < 3; j++) {
            cin >> n[i][j];
        }
    }

    int diff[8] = {0};

    int tmp;

    for (int k = 0; k < 8; k++) {
        int l = 0;
        for (int i = 0; i < 3; i++) {
            for (int j = 0; j < 3; j++) {
                tmp = n[i][j] - sq[k][l];
                diff[k] += abs(tmp);
                l++;
            }
        }
    }

    int mindiff = diff[0];
    for (int i = 0; i < 8; i++) {
        if (diff[i] < mindiff) mindiff = diff[i];
    }

    cout << mindiff << endl;
    return 0;

}