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

public class Solution {

    public static void main (String args[]) {
        Scanner scanner = new Scanner(System.in);
        int inputMatrix[] = new int[9];
        for (int i = 0; i < 9; i++) {
            inputMatrix[i] = scanner.nextInt();
        }
        System.out.println(costToMakeMatrixMagic(inputMatrix));
        scanner.close();
    }
    
    private static int costToMakeMatrixMagic(int inputMatrix[]) {
        int result = 0;
        int temp = 0;
        int givenMagicSquare[][] = {
                {8, 1, 6, 3, 5, 7, 4, 9, 2},
                {6, 1, 8, 7, 5, 3, 2, 9, 4},
                {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},
                {4, 9, 2, 3, 5, 7, 8, 1, 6},
                {2, 9, 4, 7, 5, 3, 6, 1, 8}
        };
        for (int i = 0; i < 8; i++) {
            temp = 0;
            for (int j = 0; j < 9; j++) {
                if (inputMatrix[j] != givenMagicSquare[i][j]) {
                   temp += Math.abs(givenMagicSquare[i][j] - inputMatrix[j]);
                }
            }
            if (i == 0) {
                result = temp;
            } else {
                if (temp < result) {
                    result = temp;
                }
            }
        }
        return result;
    }
}