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

int main() {
    int sum=0, minsum=999;
    int magic[8][9]= {  {8, 1, 6, 3, 5, 7, 4, 9, 2},
                        {8, 3, 4, 1, 5, 9, 6, 7, 2},
                        {6, 7, 2, 1, 5, 9, 8, 3, 4},
                        {4, 3, 8, 9, 5, 1, 2, 7, 6},
                        {2, 9, 4, 7, 5, 3, 6, 1, 8},
                        {6, 1, 8, 7, 5, 3, 2, 9, 4},
                        {4, 9, 2, 3, 5, 7, 8, 1, 6},
                        {2, 7, 6, 9, 5, 1, 4, 3, 8}
                     };
    int s[9], temp;
    for(int i=0; i<9; i++)
    {
        cin >> temp;
        s[i] = temp;
    }
    
    for(int i=0; i<8; i++)
    {
        sum = 0;
        for(int j=0; j<9; j++)
        {
            sum += abs(s[j] - magic[i][j]);   
        }
        if(sum < minsum)
        {
            minsum = sum;
        }
    }  
    cout << minsum;
    return 0;
}