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

    
int main() {
    /* Enter your code here. Read input from STDIN. Print output to STDOUT */  
    string a[9];
    string temp[]="";
    int initial[9]={0};
    for(int i=0;i<9;i++){
        cin>>a[i];
        initial[i]=stoi(a[i]);
        *temp= *temp+a[i];        
    }
    long int num=stoi(*temp);
    vector<long int> sum(8);
    long int a1[9]={8,1,6,3,5,7,4,9,2};
    long int a2[9]={6,1,8,7,5,3,2,9,4};
    long int a3[9]={4,9,2,3,5,7,8,1,6};
    long int a4[9]={2,9,4,7,5,3,6,1,8};
    long int a5[9]={8,3,4,1,5,9,6,7,2};
    long int a6[9]={4,3,8,9,5,1,2,7,6};
    long int a7[9]={6,7,2,1,5,9,8,3,4};
    long int a8[9]={2,7,6,9,5,1,4,3,8};
   
    for(int i=0;i<9;i++){
        sum[0]=sum[0]+abs(a1[i]-initial[i]);
        sum[1]=sum[1]+abs(a2[i]-initial[i]);
        sum[2]=sum[2]+abs(a3[i]-initial[i]);
        sum[3]=sum[3]+abs(a4[i]-initial[i]);
        sum[4]=sum[4]+abs(a5[i]-initial[i]);
        sum[5]=sum[5]+abs(a6[i]-initial[i]);
        sum[6]=sum[6]+abs(a7[i]-initial[i]);
        sum[7]=sum[7]+abs(a8[i]-initial[i]);
    }
    cout<<*std::min_element(sum.begin(), sum.end());

    return 0;
}