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. */
      Scanner stdin = new Scanner(System.in);
      int[] square = new int[9];
      for (int i = 0; i <9; i++) {
        square[i] = stdin.nextInt();
      }
      for (int i = 3; i <= 5; i++) { // Rearrange 3x3 matrix to spiral
        int temp = square[i];
        switch (i) {
          case 3:
            square[i] = square[5];
            square[5] = temp;
            break;
          case 4:
            square[i] = square[8];
            square[8] = temp;
            break;
          case 5:
            square[i] = square[7];
            square[7] = temp;
            break;
        }
      }
      
      int[] magic = {8, 1, 6, 7, 2, 9, 4, 3, 5}; // Known initial magic square defined in spiral
      
      int minCost = Integer.MAX_VALUE;
      for (int rot = 0; rot < 4; rot++) {
        int cost = computeCost(magic, square);
        if (cost < minCost) {
          minCost = cost;
        }
        cost = computeCost(reflectDiag(magic), square);
        if (cost < minCost) {
          minCost = cost;
        }
        magic = rotate90(magic);
      }
      System.out.println(minCost);
    }
  
    private static int[] rotate90(int[] square) {
      int n = square.length;
      int[] temp = new int[n];
      
      if (n % 2 == 1) {
        temp[n-1] = square[n-1];
        n-= 1; // Excludes central cell 
      }
      for (int i = 0; i < n; i++) {
          temp[i] = square[(i+2) % n];
      }
      return temp;
    }
  
    private static int[] reflectDiag(int[] square) {
      int n = square.length;
      int[] temp = new int[n];
      
      for (int i = 0; i < n; i++) {
        int val = square[i];
        switch (i) {
          case 5:
            temp[i] = square[3];
            temp[3] = val;
            break;
          case 6:
            temp[i] = square[2];
            temp[2] = val;
            break;
          case 7:
            temp[i] = square[1];
            temp[1] = val;
            break;
          default:
            temp[i] = val;
        }
      }
      
      return temp;
    }
  
    private static int computeCost(int[] magic, int[] square) {
      int cost = 0;
      for (int i = 0; i < magic.length; i++) {
        cost+= Math.abs(magic[i]-square[i]);
      }
      return cost;
    }
  
    private static void printSq(int[] square) {
      for (int i = 0; i < square.length; i++) {
        System.out.println(square[i]);
      }
    }
}