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

public class Solution {

    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        int[] matrix = new int[9];
        for (int i = 0; i < 9; i++) {
            matrix[i] = scanner.nextInt();
        }
        scanner.close();
        int[][] magic = {{2, 7, 6, 9, 5, 1, 4, 3, 8}, {2, 9, 4, 7, 5, 3, 6, 1, 8},
                {4, 3, 8, 9, 5, 1, 2, 7, 6}, {4, 9, 2, 3, 5, 7, 8, 1, 6},
                {6, 1, 8, 7, 5, 3, 2, 9, 4}, {6, 7, 2, 1, 5, 9, 8, 3, 4},
                {8, 1, 6, 3, 5, 7, 4, 9, 2}, {8, 3, 4, 1, 5, 9, 6, 7, 2}};

        int smallestCost = 45;
        for (int i = 0; i < 8; i++) {
            int cost = 0;
            for (int j = 0; j < 9; j++){
                cost += Math.abs(magic[i][j] - matrix[j]);
            }
            if (cost < smallestCost) {
                smallestCost = cost;
            }
        }
        System.out.println(smallestCost);
    }
}