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


int main() {
    int min=90,sum=0,d=0;
    int arr[8][9]={{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},{8,1,6,3,5,7,4,9,2},{6,1,8,7,5,3,2,9,4},{2,7,6,9,5,1,4,3,8},{6,7,2,1,5,9,8,3,4}},mrr[9];
    for(int i=0;i<9;i++)
        cin>>mrr[i];
    for(int i=0;i<8;i++)
        {
        sum=0;
        for(int j=0;j<9;j++)
            {
            d = mrr[j]-arr[i][j];
            if(d<0)
                d=-d;
            sum+=d;
        }
        if(sum<min)
            min=sum;
    }
    cout<<min;
    /* Enter your code here. Read input from STDIN. Print output to STDOUT */   
    return 0;
}