#include<iostream>
#include<cmath>
using namespace std;
int main()
{
    int arr[3][3],i,j;
    int comb1[3][3]={8,1,6,3,5,7,4,9,2};
    int comb2[3][3]={6,1,8,7,5,3,2,9,4};
    int comb3[3][3]={4,9,2,3,5,7,8,1,6};
    int comb4[3][3]={2,9,4,7,5,3,6,1,8};
    int comb5[3][3]={8,3,4,1,5,9,6,7,2};
    int comb6[3][3]={4,3,8,9,5,1,2,7,6};
    int comb7[3][3]={6,7,2,1,5,9,8,3,4};
    int comb8[3][3]={2,7,6,9,5,1,4,3,8};
    int cost[8],z;
    for(i=0;i<8;i++)
    {
        cost[i]=0;
    }
    for(i=0;i<3;i++)
    {
        for(j=0;j<3;j++)
        {
            cin>>arr[i][j];
        }
    }
    for(i=0;i<3;i++)
    {
        for(j=0;j<3;j++)
        {
            if(arr[i][j]!=comb1[i][j])
            {
                cost[0]+=abs(arr[i][j]-comb1[i][j]);
            }
            if(arr[i][j]!=comb2[i][j])
            {
                cost[1]+=abs(arr[i][j]-comb2[i][j]);
            }
            if(arr[i][j]!=comb3[i][j])
            {
                cost[2]+=abs(arr[i][j]-comb3[i][j]);
            }
            if(arr[i][j]!=comb4[i][j])
            {
                cost[3]+=abs(arr[i][j]-comb4[i][j]);
            }
            if(arr[i][j]!=comb5[i][j])
            {
                cost[4]+=abs(arr[i][j]-comb5[i][j]);
            }
            if(arr[i][j]!=comb6[i][j])
            {
                cost[5]+=abs(arr[i][j]-comb6[i][j]);
            }
            if(arr[i][j]!=comb7[i][j])
            {
                cost[6]+=abs(arr[i][j]-comb7[i][j]);
            }
            if(arr[i][j]!=comb8[i][j])
            {
                cost[7]+=abs(arr[i][j]-comb8[i][j]);
            }
        }
    }
    int min=0;
    min=cost[0];
    for(i=1;i<8;i++)
    {
        if(cost[i]<min)
        {
            min=cost[i];
        }
    }
    cout<<min;
    return 0;
}