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. */
              
        
         Scanner in = new Scanner(System.in);
        int arr[] = new int[9];
        int arr1[] = {8, 1, 6, 3, 5, 7, 4, 9, 2};
        int arr2[] = {4, 3, 8, 9, 5, 1, 2, 7, 6};
        int arr3[] = {2, 9, 4, 7, 5, 3, 6, 1, 8};
        int arr4[] = {6, 7, 2, 1, 5, 9, 8, 3, 4};
        int arr5[] = {6, 1, 8, 7, 5, 3, 2, 9, 4};
        int arr6[] = {8, 3, 4, 1, 5, 9, 6, 7, 2};
        int arr7[] = {4, 9, 2, 3, 5, 7, 8, 1, 6};
        int arr8[] = {2, 7, 6, 9, 5, 1, 4, 3, 8};
        
        
        int score1 = 0;
        int score2 = 0;
        int score3 = 0;
        int score4 = 0;
        int score5 = 0;
        int score6 = 0;
        int score7 = 0;
        int score8 = 0;
        
        for(int arr_i=0; arr_i < 9; arr_i++){
            arr[arr_i] = in.nextInt();
            
           score1 +=  Math.abs(arr[arr_i] - arr1[arr_i]);
           score2 +=  Math.abs(arr[arr_i] - arr2[arr_i]);
           score3 +=  Math.abs(arr[arr_i] - arr3[arr_i]);
           score4 +=  Math.abs(arr[arr_i] - arr4[arr_i]);
           score5 +=  Math.abs(arr[arr_i] - arr5[arr_i]);
           score6 +=  Math.abs(arr[arr_i] - arr6[arr_i]);
           score7 +=  Math.abs(arr[arr_i] - arr7[arr_i]);
           score8 +=  Math.abs(arr[arr_i] - arr8[arr_i]);
        }
        
        int arrsort[] = {score1, score2, score3, score4, score5, score6, score7, score8};
        
        Arrays.sort(arrsort);
         System.out.println(arrsort[0]);
        
        
       
      
        
        
        
       
        
    }
}