#include <cmath>
#include <cstdio>
#include <vector>
#include <iostream>
#include <algorithm>
using namespace std;
typedef vector<int> vi;
typedef vector<vi> vvi;

vi m1 = {8,1,6,3,5,7,4,9,2};
vi m2 = {4,3,8,9,5,1,2,7,6};
vi m3 = {2,9,4,7,5,3,6,1,8};
vi m4 = {6,7,2,1,5,9,8,3,4};
vi m5 = {4,9,2,3,5,7,8,1,6};
vi m6 = {2,7,6,9,5,1,4,3,8};
vi m7 = {6,1,8,7,5,3,2,9,4};
vi m8 = {8,3,4,1,5,9,6,7,2};
vvi magic;
vi input = {0,0,0,0,0,0,0,0,0};

int main() {
    magic.push_back(m1);
    magic.push_back(m2);
    magic.push_back(m3);
    magic.push_back(m4);
    magic.push_back(m5);
    magic.push_back(m6);
    magic.push_back(m7);
    magic.push_back(m8);
    for (int i = 0; i < 9; i++) {
        cin >> input[i];
    }
    int cost, tmp;
    cost = 100000;
    tmp = 0;
    for (int i = 0; i < 8; i++) {
        tmp = 0;
        for (int j = 0; j < 9; j++) {
            tmp += abs(magic[i][j] - input[j]);
        }
        cost = min(tmp, cost);
    }
    printf("%d", cost);
    return 0;
}