#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 a[3][3];
    for(int i=0;i<3;i++)
      {
      for(int j=0;j<3;j++)
        {
        cin>>a[i][j];
      }
    }
  
    int m[8][3][3]= {{{8,1,6},{3,5,7},{4,9,2}},{{6,1,8},{7,5,3},{2,9,4}},{{4,9,2},{3,5,7},{8,1,6}},
   {{2,9,4},{7,5,3},{6,1,8}},
   {{8,3,4},{1,5,9},{6,7,2}},
   {{4,3,8},{9,5,1},{2,7,6}},
   {{6,7,2},{1,5,9},{8,3,4}},
   {{2,7,6},{9,5,1},{4,3,8}}};
  
  int ans = 1000000;
  
  for(int i=0;i<8;i++)
    {
    int t=0;
     for(int j=0;j<3;j++)
       {
       
       for(int k=0;k<3;k++)
         {
            t+=abs(m[i][j][k]-a[j][k]);
       }
     }
    
    ans = min(ans,t);
  }
  
  cout<<ans<<endl;
   
    
   
  
    return 0;
}