#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 matrix[3][3] = {{4,9,2},{3,5,7},{8,1,5}};
    int m[3][3],i,a,b,j,cost=0;
    for(i=0;i<3;i++)
        for(j=0;j<3;j++)
        cin>>m[i][j];
        
    for(i=0;i<3;i++)
        for(j=0;j<3;j++)
        {
    if(m[i][j]!= matrix[i][j])  
       
        {
        //cout<<"neq";
            cost++;
               m[i][j]=a;
        matrix[i][j]=b;
        if(a>b)
            cost=cost+(a-b);
        else
            cost=cost+(b-a);
    }
    }
    ++cost;
       cout<<cost;
    return 0;
}