#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 mat[3][3];
    int ans1=0,ans2=0,ans3=0,ans4=0,ans5=0,ans6=0,ans7=0,ans8=0,ans9=0,ans10=0,ans11=0;
    for(int i=0;i<3;++i){
        
        for(int j=0;j<3;++j){
            
            cin>>mat[i][j];
        }
    }
    
    int arr1[3][3]={8,3,4,1,5,9,6,7,2};
    int arr2[3][3]={6,1,8,7,5,3,2,9,4};
    int arr3[3][3]={2,7,6,9,5,1,4,3,8};
    int arr4[3][3]={4,9,2,3,5,7,8,1,6};
    int arr5[3][3]={4,3,8,9,5,1,2,7,6};
    int arr6[3][3]={6,7,2,1,5,9,8,3,4};
    int arr7[3][3]={6,1,8,7,5,3,2,9,4};
    int arr8[3][3]={4,9,2,3,5,7,8,1,6};
    int arr9[3][3]={2,9,4,7,5,3,6,1,8};
    int arr10[3][3]={8,1,6,3,5,7,4,9,2};
  //  int arr11[3][3]={4,3,2,9,5,7,8,1,6};
   
    
    for(int i=0;i<3;++i){
        
        for(int j=0;j<3;++j){
            
            ans1+=abs(mat[i][j]-arr1[i][j]);
            ans2+=abs(mat[i][j]-arr2[i][j]);
            ans3+=abs(mat[i][j]-arr3[i][j]);
            ans4+=abs(mat[i][j]-arr4[i][j]);
            ans5+=abs(mat[i][j]-arr5[i][j]);
            ans6+=abs(mat[i][j]-arr6[i][j]);
            ans7+=abs(mat[i][j]-arr7[i][j]);
            ans8+=abs(mat[i][j]-arr8[i][j]);
            ans9+=abs(mat[i][j]-arr9[i][j]);
            ans10+=abs(mat[i][j]-arr10[i][j]);
           // ans11+=abs(mat[i][j]-arr11[i][j]);
        }
        
    }
    
    cout<<min(min(min(min(ans1,min(min(ans2,ans3),ans4)),min(ans5,ans6)),min(ans7,ans8)),min(ans9,ans10))<<"\n";
   
    
    
    return 0;
}