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


int main() {
     int change=0,minchange=81;
     int  msquares[8][9]={
            {6, 1, 8, 7, 5, 3, 2, 9, 4},
            {8, 1, 6, 3, 5, 7, 4, 9, 2},
            {8, 3, 4, 1, 5, 9, 6, 7, 2},
            {6, 7, 2, 1, 5, 9, 8, 3, 4},
            {2, 7, 6, 9, 5, 1, 4, 3, 8},
            {4, 3, 8, 9, 5, 1, 2, 7, 6},
            {4, 9, 2, 3, 5, 7, 8, 1, 6},
            {2, 9, 4, 7, 5, 3, 6, 1, 8}
    } ;
    int input[9];
    for(int i=0;i<9;i++)
        cin>>input[i];
    for(int i=0;i<8;i++)
        {
          change=0;
          for(int j=0;j<9;j++)
              {
              change=change+abs(msquares[i][j]-input[j]);
             
          }
        if(change<minchange)
            minchange=change;
    }
    cout<<minchange;
    return 0;
}