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

int absolute(int x, int y)
    {
    if(x>y)
        return x-y;
    else
        return y-x;
}

int main(){
    int squares[8][9] = {
        {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},
        {6, 7, 2, 1, 5, 9, 8, 3, 4},
        {2, 7, 6, 9, 5, 1, 4, 3, 8},
        {4, 3, 8, 9, 5, 1, 2, 7, 6},
        {4, 9, 2, 3, 5, 7, 8, 1, 6},
        {2, 9, 4, 7, 5, 3, 6, 1, 8}
    };
    int s [9];
    int change = 100, changeActu=0;
    
    for(int i= 0 ; i<9;i++)
        scanf("%d", &s[i]);
    for(int i=0;i<8;i++)
        {
        for(int j = 0;j<9;j++)
            {
            if(s[j]!=squares[i][j])
                changeActu+=absolute(s[j],squares[i][j]);
                
        }
        if(changeActu<change)
            change=changeActu;
        changeActu =0;
    }
    printf("%d",change);
    
    
    return 0;
}