#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 i,j,s[3][3],a[9];
      int min=1000;
        for(i=0;i<3;i++)
        for(j=0;j<3;j++)
            
            {
           
            cin>>s[i][j];
            
            a[i*3 +j]=s[i][j];
            
            
        }
          int matrix[8][9]={{4,9,2,3,5,7,8,1,6},{2,7,6,9,5,1,4,3,8},{6,1,8,7,5,3,2,9,4},{8,3,4,1,5,9,6,7,2},{2,9,4,7,5,3,6,1,8},{6,7,2,1,5,9,8,3,4},{8,1,6,3,5,7,4,9,2},{4,3,8,9,5,1,2,7,6}};
    
    int sum=0;
    for(i=0;i<8;i++)
        {sum=0;
    for(j=0;j<9;j++)
        {
           sum += abs(matrix[i][j] - a[j]);
        
          
    }
        
         if( min > sum)
             min =sum;
    }
    
    cout<<min;
    return 0;
}