import java.io.*;
import java.util.*;

public class Solution {

    public static void main(String[] args) {
        /* Enter your code here. Read input from STDIN. Print output to STDOUT. Your class should be named Solution. */
       Scanner scan = new Scanner(System.in);
        int n = 9;
        int k = 8;
        int[][] arrayCheck = new int[k][n];
        int[] array = new int[n];
        for (int i = 0; i < n; i++) {
            array[i] = scan.nextInt();
        }

        arrayCheck[0] = new int[] {
            2, 9, 4, 7, 5, 3, 6, 1, 8
        } ;
        arrayCheck[1] = new int[] {
            6, 7, 2, 1, 5, 9, 8, 3, 4
        } ;
        arrayCheck[2] = new int[] {
            8, 1, 6, 3, 5, 7, 4, 9, 2
        } ;
        arrayCheck[3] = new int[] {
            4, 3, 8, 9, 5, 1, 2, 7, 6
        } ;
        arrayCheck[4] = new int[] {
            4, 9, 2, 3, 5, 7, 8, 1, 6
        } ;
        arrayCheck[5] = new int[] {
            8, 3, 4, 1, 5, 9, 6, 7, 2
        } ;
        arrayCheck[6] = new int[] {
            6, 1, 8, 7, 5, 3, 2, 9, 4
        } ;
        arrayCheck[7] = new int[]{
            2, 7, 6, 9, 5, 1, 4, 3, 8
        } ;
        
        int[] arrayCoast = new int[8];
        for(int i = 0; i < k; i++) {
            int coast = 0;
            for(int j = 0; j < n; j++){
                coast += Math.abs(arrayCheck[i][j] - array[j]);
            }
            arrayCoast[i] = coast;
        }
        
        Arrays.sort(arrayCoast);
        System.out.println(arrayCoast[0]);
    }
}