#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 n=3;
    int matrix[9],cost[9]={0},mini=100;
    for(int i=0;i<n*n;i++)
        cin>>matrix[i];
    int mat[8][9]={{6,1,8,7,5,3,2,9,4},{8,1,6,3,5,7,4,9,2},{4,3,8,9,5,1,2,7,6},{2,9,4,7,5,3,6,1,8},{6,7,2,1,5,9,8,3,4},{8,3,4,1,5,9,6,7,2},{4,9,2,3,5,7,8,1,6},{2,7,6,9,5,1,4,3,8}};
    for(int i=0;i<8;i++)
        {
        cost[i]=0;
        for(int j=0;j<9;j++)
            {
            cost[i]+=abs(matrix[j]-mat[i][j]);
        }
        mini=min(mini,cost[i]);
    }
    cout<<mini<<endl;
    return 0;
}