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. */
        final int[][] MAGIC_SQUARE = {
                {2, 9, 4, 7, 5, 3, 6, 1, 8},
                {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},
                {6, 7, 2, 1, 5, 9, 8, 3, 4},
                {6, 1, 8, 7, 5, 3, 2, 9, 4},
                {8, 3, 4, 1, 5, 9, 6, 7, 2},
                {8, 1, 6, 3, 5, 7, 4, 9, 2}
        };

        Scanner sc = new Scanner(System.in);
        int[] arr = new int[9];
        for (int a0 = 0; a0 < 9; a0++)
            arr[a0] = sc.nextInt();

        int min_cost = 81;
        for (int i = 0; i < 8; i++) {
            int cost = 0;
            for (int j = 0; j < 9; j++)
                cost += Math.abs(arr[j] - MAGIC_SQUARE[i][j]);

            min_cost = Math.min(min_cost, cost);
        }
        System.out.println(min_cost);
        sc.close();
    }
}