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

public class Solution {

    private static final int magic[] = {
            8, 1, 6, 3, 5, 7, 4, 9, 2,
            4, 3, 8, 9, 5, 1, 2, 7, 6,
            2, 9, 4, 7, 5, 3, 6, 1, 8,
            6, 7, 2, 1, 5, 9, 8, 3, 4,

            8, 1, 8, 7, 5, 3, 2, 9, 4,
            2, 7, 6, 9, 5, 1, 4, 3, 8,
            4, 9, 2, 3, 5, 7, 8, 1, 6,
            8, 3, 4, 1, 5, 9, 6, 7, 2
    };

    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);

        int a[] = new int[9];

        for (int i = 0; i < 9; i++) {
            a[i] = sc.nextInt();
        }

        // Solve
        int min = Integer.MAX_VALUE;
        for (int i = 0; i < 8; i++) {
            int diff = 0;
            for (int j = 0; j < 9; j++) {
                diff += Math.abs(magic[i * 9 + j] - a[j]);
            }

            if (diff < min) {
                min = diff;
            }
        }

        System.out.println(min);
    }
}