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

int calculateCost(int arr1[3][3], int arr2[3][3]) {
    int cost = 0; 
    for (int i=0;i<3;++i) {
         for (int j=0;j<3;++j) {
             //cout << arr1[i][j] << " - " << arr2[i][j] << " = ";
             //cout << abs(arr1[i][j] - arr2[i][j]) << endl;
            cost += abs(arr1[i][j] - arr2[i][j]);
         }
        //cout << endl;
    }
    //cout << "Total Cost : " << cost << endl << endl;
    return cost;
}


int main() {
    int matrix[3][3];
    for (int i=0;i<3;++i) {
        string values;
        getline(cin, values);
        istringstream ss(values);
        for (int j=0;j<3;++j) {
            int num;
            ss >> num;
            matrix[i][j] = num;
        }
    }
    
    int magicSq1[3][3] = {{8,1,6},{3,5,7},{4,9,2}};
    int magicSq2[3][3] = {{4,9,2},{3,5,7},{8,1,6}};
    int magicSq3[3][3] = {{8,3,4},{1,5,9},{6,7,2}};
    int magicSq4[3][3] = {{6,7,2},{1,5,9},{8,3,4}};
    int magicSq5[3][3] = {{2,9,4},{7,5,3},{6,1,8}};
    int magicSq6[3][3] = {{6,1,8},{7,5,3},{2,9,4}};
    int magicSq7[3][3] = {{4,3,8},{9,5,1},{2,7,6}};
    int magicSq8[3][3] = {{2,7,6},{9,5,1},{4,3,8}};
    
    vector<int> costs;
    
    
    costs.push_back(calculateCost(matrix, magicSq1));
    costs.push_back(calculateCost(matrix, magicSq2));
    costs.push_back(calculateCost(matrix, magicSq3));
    costs.push_back(calculateCost(matrix, magicSq4));
    costs.push_back(calculateCost(matrix, magicSq5));
    costs.push_back(calculateCost(matrix, magicSq6));
    costs.push_back(calculateCost(matrix, magicSq7));
    costs.push_back(calculateCost(matrix, magicSq8));
    
    int minCost = costs.at(0);
    for(int i=0;i<8;++i) {
        //cout << costs.at(i) << " ";
        if (minCost > costs.at(i)) {
            minCost = costs.at(i);
        }
    }
    cout << minCost;
    
    
    
    
    
    /*
    for (int i=0;i<3;++i) {
         for (int j=0;j<3;++j) {
             cout << magicSq1[i][j] << " ";
         }
        cout << endl;
    }*/
    return 0;
}