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


int main() {
    /* Enter your code here. Read input from STDIN. Print output to STDOUT */
    int all[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}};
    int cost = INT_MAX;
    int A[9];
    int temp = 0;
    for(int i = 0; i < 9; i ++)
        {
        cin>>A[i];
    }
    for(int j = 0; j < 8; j ++)
        {
        temp = 0;
        for(int i = 0; i < 9; i ++)
            {
            temp += abs(A[i] - all[j][i]); 
        }
        if(temp < cost)
            cost = temp;
    }
    cout<<cost;
}