#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 inputSquare[9];
    int allMagicSquares[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}
    };
    
    for(int i=0;i<9;i++){
        cin>>inputSquare[i];
    }
    
    int minChange = 100;
    for(int i=0;i<8;i++){
        int change = 0;
        for(int j=0;j<9;j++){
            if((inputSquare[j] - allMagicSquares[i][j]) != 0 ){
                change += abs(allMagicSquares[i][j] - inputSquare[j]);
            }
        }
        //cout<<change<<endl;
        if(change<minChange){
            minChange = change;
        }
    }
    cout<<minChange;
    return 0;
}