#include <iostream>
#include <cmath>
#include <vector>
#include <algorithm>
#define every(iter,iterable) for(typeof((iterable).begin()) iter =iterable.begin();iter!=iterable.end();iter++)
#include<string.h>
#include<stack>


using namespace std;

int cost(int [3][3],int [3][3]);
int cost(int a[3][3],int b[3][3])
{
    int z=0;
    for(int i=0;i<3;i++)
    {
        for(int j=0;j<3;j++)
        {
            z=z+abs(a[i][j]-b[i][j]);
        }
    }
    return z;
}


int main()
{
    int a[3][3];
    int r[4];

    for(int i=0;i<3;i++)
    {

        for(int j=0;j<3;j++)
        {
            cin>>a[i][j];
        }
    }

    int a1[3][3]={4,9,2,3,5,7,8,1,6};
    int a2[3][3]={4,3,8,9,5,1,2,7,6};
    int a3[3][3]={6,7,2,1,5,9,8,3,4};
    int a4[3][3]={6,1,8,7,5,3,2,9,4};
    int a5[3][3]={8,3,4,1,5,9,6,7,2};
    int a6[3][3]={8,1,6,3,5,7,4,9,2};
    int a7[3][3]={2,9,4,7,5,3,6,1,8};
    int a8[3][3]={2,7,6,9,5,1,4,3,8};


    int z[8];
    z[0]=cost(a,a1);
    z[1]=cost(a,a2);
    z[2]=cost(a,a3);
    z[3]=cost(a,a4);
    z[4]=cost(a,a5);
    z[5]=cost(a,a6);
    z[6]=cost(a,a7);
    z[7]=cost(a,a8);
        int m=z[0];
        for(int i=0;i<8;i++)
        {
            if(z[i]<m)
            {
                m=z[i];
            }
        }

    cout<<m<<endl;










    return 0;
}