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

int magsq[8][9] = {
    {4,9,2,3,5,7,8,1,6},
    {2,9,4,7,5,3,6,1,8},
    {2,7,6,9,5,1,4,3,8},
    {6,7,2,1,5,9,8,3,4},
    {6,1,8,7,5,3,2,9,4},
    {8,1,6,3,5,7,4,9,2},
    {8,3,4,1,5,9,6,7,2},
    {4,3,8,9,5,1,2,7,6}
};

int score[8];
int cur;

int main() {
    /* Enter your code here. Read input from STDIN. Print output to STDOUT */ 
    for(int i=0; i<9; i++){
        cin>>cur;
        for(int j=0; j<8; j++){
            score[j]+=abs(cur-magsq[j][i]);
        }
    }
    cur=999;
    for(int i=0; i<8; i++){
        if(cur>score[i])cur=score[i];
    }
    cout<<cur;
    return 0;
}