#include <stdio.h>
#include <string.h>
#include <math.h>
#include <stdlib.h>

int dodiff(int matrix[][9],int j,int arr[])
    {
    int diff=0;
    for(int i=0;i<9;i++)
        {
        diff+=abs(matrix[j][i]-arr[i]);
    }
    return diff;
}

int main() {

    /* Enter your code here. Read input from STDIN. Print output to STDOUT */  
    int min;
    int arr[9];
    int diff[8];
    
    for(int i=0;i<9;i++)
        {
        scanf("%d",&arr[i]);
        
        
    }
    
     int matrix[8][9]={{4,9,2,3,5,7,8,1,6},{2,7,6,9,5,1,4,3,8},{6,1,8,7,5,3,2,9,4},{8,3,4,1,5,9,6,7,2},{2,9,4,7,5,3,6,1,8},{6,7,2,1,5,9,8,3,4},{8,1,6,3,5,7,4,9,2},{4,3,8,9,5,1,2,7,6}};
    
    
    for(int i=0;i<8;i++)
        {
        diff[i]=dodiff(matrix,i,arr);
    }
    
     min=diff[0];
    
    for(int i=0;i<8;i++)
        {
        if(diff[i]<min)
            min=diff[i];
    }
    
    printf("%d",min);
    
    return 0;
}