#include <bits/stdc++.h>
#define ll long long int
#define gt(i) scanf("%lld", &i)

using namespace std;

int main() {
    ll i, j, k, n, m;
    ll mt[8][3][3] = {{{4, 9, 2}, {3, 5, 7}, {8, 1, 6}}, {{4, 3, 8}, {9, 5, 1}, {2, 7, 6}}, {{8, 1, 6}, {3, 5, 7}, {4, 9, 2}}, {{8, 3, 4}, {1, 5, 9}, {6, 7, 2}}, {{6, 1, 8}, {7, 5, 3}, {2, 9, 4}}, {{6, 7, 2}, {1, 5, 9}, {8, 3, 4}}, {{2, 7, 6}, {9, 5, 1}, {4, 3, 8}}, {{2, 9, 4}, {7, 5, 3}, {6, 1, 8}}};
    ll ans[3][3];
    for(i = 0; i < 3; i++) {
        for(j = 0; j < 3; j++) {
            gt(ans[i][j]);
        }
    }
    ll minv = INT_MAX, diff;
    for(i = 0; i < 8; i++) {
        diff = 0; 
        for(j = 0; j < 3; j++) {
            for(k = 0; k < 3; k++) {
                diff += abs(mt[i][j][k] - ans[j][k]);
            }
        }
        if(diff < minv)
            minv = diff;
    }
    cout << minv << endl;
    return 0;
}