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


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