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


int main() {

    int base[8][9] = {
        8, 1, 6, 3, 5, 7, 4, 9, 2,
        6, 1, 8, 7, 5, 3, 2, 9, 4,
        8, 3, 4, 1, 5, 9, 6, 7, 2,
        4, 3, 8, 9, 5, 1, 2, 7, 6,
        6, 7, 2, 1, 5, 9, 8, 3, 4,
        2, 7, 6, 9, 5, 1, 4, 3, 8,
        4, 9, 2, 3, 5, 7, 8, 1, 6,
        2, 9, 4, 7, 5, 3, 6, 1, 8
    };

    int cost = 10000;

    int m[9];
    for (int i = 0; i < 9; ++i)
    {
        cin >> m[i];
    }

    for (int i = 0; i < 8; i++)
    {
        int aux = 0;
        for (int j = 0; j < 9; j++)
        {
            aux += abs(base[i][j] - m[j]);
        }

        cost = aux < cost ? aux : cost;
    }

    cout << cost << endl;

    return 0;
}