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

public class Solution {

    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        int[][] m = new int[3][];
        for (int i = 0; i < m.length; i++) {
            m[i] = new int[3];
            for (int j = 0; j < m[i].length; j++) {
                m[i][j] = in.nextInt();
            }
        }

        int[][] magic = {{4, 9, 2}, {3, 5, 7}, {8, 1, 6}};

        int min = Integer.MAX_VALUE;

        min = Integer.min(min, cost(m, magic));
        min = Integer.min(min, cost(m, magic = rotate(magic)));
        min = Integer.min(min, cost(m, magic = rotate(magic)));
        min = Integer.min(min, cost(m, magic = rotate(magic)));
        min = Integer.min(min, cost(m, magic = flip(rotate(magic))));
        min = Integer.min(min, cost(m, magic = rotate(magic)));
        min = Integer.min(min, cost(m, magic = rotate(magic)));
        min = Integer.min(min, cost(m, magic = rotate(magic)));

        System.out.println(min);

    }

    private static int[][] rotate(int[][] mat) {
        int[][] ret = new int[mat.length][mat.length];
        for (int i = 0; i < mat.length; i++) {
            for (int j = 0; j < mat.length; j++) {
                ret[j][mat.length - 1 - i] = mat[i][j];
            }
        }
        return ret;
    }

    private static int[][] flip(int[][] mat) {
        int[][] ret = new int[mat.length][mat.length];
        for (int i = 0; i < mat.length; i++) {
            for (int j = 0; j < mat.length; j++) {
                ret[mat.length - 1 - i][j] = mat[i][j];
            }
        }
        return ret;
    }

    private static int cost(int[][] m, int[][] magic) {
        int cost = 0;
        for (int i = 0; i < m.length; i++) {
            for (int j = 0; j < m[i].length; j++) {
                cost += Math.abs(m[i][j] - magic[i][j]);
            }
        }
        return cost;
    }
}