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

int main()
{
int ar[3][3];
int cost = 9000; //randomly assigned large number
int equal = 0;
    
int matrix[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}},
{{6,7,2},{1,5,9},{8,3,4}},
{{8,3,4},{1,5,9},{6,7,2}}};

for(int i = 0; i <3; i++)
    {   
        for(int j = 0; j<3; j++)
        {
            cin>>ar[i][j]; 
                       
        }
    }
    
    for(int i = 0; i<8; i++)
    {   
        int temp = 0;
        for(int j = 0; j<3; j++)
        {
            for(int k =0; k<3; k++)
            {                                    
                    temp = temp + abs(matrix[i][j][k]-ar[j][k]);
                                                        
            }
            
        }
        if(temp < cost)
        {
            cost = temp;
        }
            
        
    }    
    
   
        cout<<cost;        
    

    return 0;
}