#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 arr[9] =    {4,9,2,3,5,7,8,1,6} ;
    int arr1[9] =   {2,7,6,9,5,1,4,3,8} ;
    int arr2[9] =   {6,1,8,7,5,3,2,9,4};
    int arr3[9] =   {2,9,4,7,5,3,6,1,8};
    int arr4[9] =   {6,7,2,1,5,9,8,3,4};
    int arr5[9] =   {8,1,6,3,5,7,4,9,2};
    int arr6[9] =   {8,3,4,1,5,9,6,7,2};
    int arr7[9] =   {4,3,8,9,5,1,2,7,6};
    int ans[8] = {0};
    for(int i =0;i<9;i++)
    {
        int k;cin>>k;
        ans[0] += abs(k - arr[i]);
        ans[1] += abs(k - arr1[i]);
        ans[2] += abs(k - arr2[i]);
        ans[3] += abs(k - arr3[i]);
        ans[4] += abs(k - arr4[i]);
        ans[5] += abs(k - arr5[i]);
        ans[7] += abs(k - arr7[i]);
        ans[6] += abs(k - arr6[i]);
        
    }
    int min =ans[0];
    for(int i=0;i<8;i++)
        if(ans[i]<min)
            min = ans[i];
    cout<<min<<endl;
        return 0;
}