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


int main() {
    
    int matrix[8][9] = {
        
        {4, 9, 2, 3, 5, 7, 8, 1, 6},
        {8, 1, 6, 3, 5, 7, 4, 9, 2},
        {2, 9, 4, 7, 5, 3, 6, 1, 8},
        {6, 1, 8, 7, 5, 3, 2, 9, 4},
        {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},
        {8, 3, 4, 1, 5, 9, 6, 7, 2}
    };
    
    /* Enter your code here. Read input from STDIN. Print output to STDOUT */   
    int m[9];
    cin >> m[0] >> m[1] >> m[2] >> m[3] >> m[4] >> m[5] >> m[6] >> m[7] >> m[8];
    
    
    int min = 100;
    for (int i = 0; i < 8; i++) {
        
        int cost = 0;
        
        for (int j = 0; j < 9; j++) {
            cost += abs(matrix[i][j] - m[j]);
        }
        if (min > cost) {
            min = cost;
        }
    }
    cout << min;
    return 0;
}