#include <cmath>
#include <cstdio>
#include <vector>
#include <iostream>
#include <algorithm>
using namespace std;
int cost=99999;
void calc(int a[3][3],int b[3][3]){
    int i,j,temp=0;
    for(i=0;i<3;i++){
        for(j=0;j<3;j++){
            temp+=abs(a[i][j]-b[i][j]);
        }
    }
    if(cost>temp){
        cost=temp;
    }
}

int main() {
    int inp[3][3],i,j;
    for(i=0;i<3;i++){
        for(j=0;j<3;j++){
            cin>>inp[i][j];
        }
    }
    int a[3][3]={8,1,6,3,5,7,4,9,2};
    int b[3][3]={6,1,8,7,5,3,2,9,4};
    int c[3][3]={8,3,4,1,5,9,6,7,2};
    int d[3][3]={6,7,2,1,5,9,8,3,4};
    int e[3][3]={4,9,2,3,5,7,8,1,6};
    int f[3][3]={2,9,4,7,5,3,6,1,8};
    int g[3][3]={4,3,8,9,5,1,2,7,6};
    int h[3][3]={2,7,6,9,5,1,4,3,8};
    calc(inp,a);
    calc(inp,b);
    calc(inp,c);
    calc(inp,d);
    calc(inp,e);
    calc(inp,f);
    calc(inp,g);
    calc(inp,h);
    cout<<cost;
    /* Enter your code here. Read input from STDIN. Print output to STDOUT */   
    return 0;
}