#include <iostream>
using namespace std;

int main() {
    int z[3][3],k=0,add[8],mini=0,i,j,sum=0,arr[9];
    for(i=0;i<3;i++)
        for(j=0;j<3;j++)
            cin >> z[i][j];
    for(i=0;i<3;i++)
        for(j=0;j<3;j++,k++)
            arr[k] = z[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}};
    for (i=0;i<8;i++){
        for(j=0,k=0;j<9;j++,k++){
              matrix[i][j] = matrix[i][j] - arr[k];
              if(matrix[i][j] < 0)
                 matrix[i][j] = -1 * matrix[i][j];
        }
    }
    for(i=0;i<8;++i){
        sum=0;
        for(j =0; j <9;++j){
            sum += matrix[i][j];
        }
        add[i] = sum;
    }
    for(j=0;j<8;j++)
         if(add[j]<add[mini])
             mini=j;
    cout << add[mini];
    return 0;
}