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) {
        /* Enter your code here. Read input from STDIN. Print output to STDOUT. Your class should be named Solution. */
        int[][] all3By3MagicSquares = new int[][]{
            { 8, 1, 6, 3, 5, 7, 4, 9, 2},
            { 6, 1, 8, 7, 5, 3, 2, 9, 4},
            { 4, 9, 2, 3, 5, 7, 8, 1, 6},
            { 2, 9, 4, 7, 5, 3, 6, 1, 8},
            { 8, 3, 4, 1, 5, 9, 6, 7, 2},
            { 4, 3, 8, 9, 5, 1, 2, 7, 6},
            { 6, 7, 2, 1, 5, 9, 8, 3, 4},
            { 2, 7, 6, 9, 5, 1, 4, 3, 8}
        };
        //Get input
        Scanner in = new Scanner(System.in);
        int inputMatric[] = new int[9];
        for(int i = 0; i < 9; i++) {
            inputMatric[i] = in.nextInt();
            //System.out.println(inputMatric[i]);
        }
        //Loop through Magic Squares
        int costOfEachSquare[] = new int[]{
            0, 0, 0, 0, 0, 0, 0, 0
        };
        for(int i = 0; i < all3By3MagicSquares.length; i++) {
            //System.out.println("Test 1");
            for(int j = 0; j < 9; j++) {
              if(all3By3MagicSquares[i][j] != inputMatric[j]) {
                  costOfEachSquare[i] += Math.abs(inputMatric[j] - all3By3MagicSquares[i][j]);
              }   
            }
            //System.out.println(i);
        }
        //Find min and output
        int minCost = 1000;
        for(int i =0; i < 8; i++) {
            if(costOfEachSquare[i] < minCost) { 
                minCost = costOfEachSquare[i];
            }
        }
        System.out.println(minCost);
    }
}