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

public class Solution {

    public static void main(String[] args) {
        Scanner scan = new Scanner(System.in);
        String[] line1Arr = scan.nextLine().split(" ");
        String[] line2Arr = scan.nextLine().split(" ");
        String[] line3Arr = scan.nextLine().split(" ");
        
        int[] line1 = new int[3];
        int[] line2 = new int[3];
        int[] line3 = new int[3];
        
        for(int i = 0; i < 3; i++) {
            line1[i] = Integer.parseInt(line1Arr[i]);
            line2[i] = Integer.parseInt(line2Arr[i]);
            line3[i] = Integer.parseInt(line3Arr[i]);
        }
        
        int[][] magicArr = {line1, line2, line3};
        
        List<Integer> costArr = new ArrayList<>(8);
        
        int[][] arr1 = {
            {2, 7, 6},
            {9, 5, 1},
            {4, 3, 8}
        };
        
        int[][] arr2 = {
            {4, 3, 8},
            {9, 5, 1},
            {2, 7, 6}
        };
        
        int[][] arr3 = {
            {8, 1, 6},
            {3, 5, 7},
            {4, 9, 2}
        };
        
        int[][] arr4 = {
            {6, 1, 8},
            {7, 5, 3},
            {2, 9, 4}
        };
        
        int[][] arr5 = {
            {6, 7, 2},
            {1, 5, 9},
            {8, 3, 4}
        };
        
        int[][] arr6 = {
            {8, 3, 4},
            {1, 5, 9},
            {6, 7, 2}
        };
        
        int[][] arr7 = {
            {2, 9, 4},
            {7, 5, 3},
            {6, 1, 8}
        };
        
        int[][] arr8 = {
            {4, 9, 2},
            {3, 5, 7},
            {8, 1, 6}
        };
        
        int[][][] templateArr = {arr1, arr2, arr3, arr4, 
                                 arr5, arr6, arr7, arr8};
        
        for(int i = 0; i < templateArr.length; i++) {
            int cost = 0;
            
            for(int j = 0; j < 3; j++) {
                for(int k = 0; k < 3; k++) {
                    cost += Math.abs(templateArr[i][j][k] - magicArr[j][k]);
                }
            }
            
            costArr.add(cost);
        }
        
        Collections.sort(costArr);
        
        System.out.println(costArr.get(0));
    }
}