import java.io.*;
import java.util.*;
import java.text.*;
import java.math.*;
import java.util.regex.*;

public class Solution {

  public static void main(String[] args) {
    int[][] magicSquare = {
      {2, 7, 6},
      {9, 5, 1},
      {4, 3, 8}
    };
    // magicSquare = rotateRight(magicSquare);
    // printMatrix(magicSquare);
    int[][] square = makeMatrix(new Scanner(System.in));

    int n = 3;
    int minimum = Integer.MAX_VALUE;
    for (int i = 0; i < 2; i++) {
      for (int j = 0; j < 4; j++) {
        minimum = Math.min(countDiff(magicSquare, square), minimum);
        magicSquare = rotateRight(magicSquare);
      }
      magicSquare = reflectDown(magicSquare);
    }

    System.out.println(minimum);

  }

  public static void printMatrix(int[][] matrix) {
    for (int i = 0; i < matrix.length; i++) {
      for (int j = 0; j < matrix[i].length; j++) {
        System.out.print(matrix[i][j] + " ");
      }
      System.out.println();
    }
  }

  public static int[][] makeMatrix(Scanner scan) {
    int n = 3;
    int[][] square = new int[n][n];

    for (int i = 0; i < n; i++) {
      for (int j = 0; j < n; j++) {
        square[i][j] = scan.nextInt();
      }
    }
    return square;
  }

  public static int countDiff(int[][] magicSquare, int[][] input) {
    int n = 3;
    int diff = 0;
    for (int i = 0; i < n; i++) {
      for (int j = 0; j < n; j++) {
        diff += Math.abs(magicSquare[i][j] - input[i][j]);
      }
    }
    return diff;
  }

  public static int[][] rotateRight(int[][] matrix) {
    int n = 3;
    int[][] rotated = new int[n][n];

    for (int i = 0; i < n; i++) {
      for (int j = 0; j < n; j++) {
        rotated[i][j] = matrix[n - j - 1][i];
      }
    }

    return rotated;
  }

  public static int[][] reflectDown(int[][] matrix) {
    int n = 3;
    for (int i = 0; i < n; i++) {
      for (int j = 0; j < n / 2; j++) {
        int temp = matrix[j][i];
        matrix[j][i] = matrix[n - j - 1][i];
        matrix[n - j - 1][i] = temp;
      }
    }
    return matrix;
  }
}