#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 cost, minCost = 999999;   
    int magicArray[9];    
    int testArray[8][9] =
    {
        {8,1,6,3,5,7,4,9,2},
        {6,1,8,7,5,3,2,9,4},
        {4,9,2,3,5,7,8,1,6},
        {2,9,4,7,5,3,6,1,8},
        {8,3,4,1,5,9,6,7,2},
        {4,3,8,9,5,1,2,7,6},
        {6,7,2,1,5,9,8,3,4},
        {2,7,6,9,5,1,4,3,8}
    };
    
    //fill array
    for (int i = 0; i < 9; i++)
    {
        cin >> magicArray[i];
    }
    
    //Test against testArray
    for (int i = 0; i < 8; i++)
    {
        cost = 0;
        
        for (int j = 0; j < 9; j++)
        {
            cost = cost + abs(testArray[i][j] - magicArray[j]);                     
        }
        
        if (cost < minCost)
        {
            minCost = cost;
        } 
    }
    
    cout << minCost;
    return 0;
}