#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 s[9];
    int magics[8][9] = {
        {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}
    }; 
    
    for (int i = 0; i < 9; i++) {
        cin >> s[i];
    }
    
    int minDiff = 9999;
    int count;
    
    for (int i = 0; i < 8; i++) {
        count = 0;
        
        for (int j = 0; j < 9; j++) {
            count += abs(magics[i][j] - s[j]);
        }
        
        if (minDiff > count) {
            minDiff = count;
        }
    }
    
    cout << minDiff << endl;
    
    return 0;
}