import java.io.*;
import java.util.*;
import java.text.*;
import java.math.*;
import java.util.regex.*;

public class Solution {

    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        int sum=0,min=50;
        int a[] = new int[9];
        for(int a_i=0; a_i < 9; a_i++){
            a[a_i] = in.nextInt();
        }
        int[][] matrix={{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++)
        {
            sum=0;
            for(int j=0;j<9;j++)
            {
                sum=sum+Math.abs(matrix[i][j]-a[j]);
            }
            if(sum<=min)
            {
                min=sum;
            }
        }
        System.out.println(min);
    }
}