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

public class Solution {
    
    public static int[] nums = new int[10];
    public static int[][] checks = new int[3][3];
    public static int count = 1000;
    public static boolean perfect = false;
    
    public static List<int[][]> caches = new ArrayList<>();
    
    public static int[][] p1 = new int[][] { {8,1,6},{3,5,7},{4,9,2} };
    public static int[][] p2 = new int[][] { {4,3,8},{9,5,1},{2,7,6} };
    public static int[][] p3 = new int[][] { {2,9,4},{7,5,3},{6,1,8} };
    public static int[][] p4 = new int[][] { {6,7,2},{1,5,9},{8,3,4} };
    public static int[][] p5 = new int[][] { {6,1,8},{7,5,3},{2,9,4} };
    public static int[][] p6 = new int[][] { {8,3,4},{1,5,9},{6,7,2} };
    public static int[][] p7 = new int[][] { {4,9,2},{3,5,7},{8,1,6} };
    public static int[][] p8 = new int[][] { {2,7,6},{9,5,1},{4,3,8} };
    
    //Rules
    //5 in center
    //even numbers in corners

    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        
        int[][] matrix = new int[3][3];
        boolean perfect = false;
        
        caches.add(p1);
        caches.add(p2);
        caches.add(p3);
        caches.add(p4);
        caches.add(p5);
        caches.add(p6);
        caches.add(p7);
        caches.add(p8);
        
        for(int x = 0; x < 3; x++) {
            for(int y = 0; y < 3; y++) {
                matrix[x][y] = in.nextInt();
                nums[matrix[x][y]]++;
            }
        }
 
        for(int p = 0; p < 8; p++) {
            int[][] perf = caches.get(p);
            int score = 0;
            for(int r = 0; r < matrix.length; r++) {
                for(int c = 0; c < matrix.length; c++) {
                    score += Math.abs(matrix[r][c] - perf[r][c]);
                }
            }
            
            if(score < count) {
                count = score;
            }
        }
        
        System.out.println(count); 
    }
    
    public static void perfectCheck(int[][]arr) {
        int diagtotal = 0;
        for(int row = 0; row < 3; row++) {
            int rowtotal = 0;
            int coltotal = 0;
            for(int col = 0; col < 3; col++) {
                rowtotal += arr[row][col];
                coltotal += arr[col][row];
            }
            
            diagtotal += arr[row][row];
            System.out.println("Row " + row + " = " + rowtotal);
            System.out.println("Column " + row + " = " + coltotal);
            if(rowtotal != 15 || coltotal != 15) {
                perfect = false;
            }
        }
        
        printArray(arr);
        System.out.println("Diagonal = " + diagtotal);
        
        if(diagtotal != 15) {
            perfect = false;
        }
    }
    
    public static void printArray(int[][] a) {
        for(int x = 0;  x < a.length; x++) {
            for(int y = 0; y < a.length; y++) {
                System.out.print(a[x][y] + " ");
            }
            System.out.print("\n");
        }
    }
}