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 mSq[][]={{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}};
        int mSqIn[]=new int[9];
        int distance=0;
        int varSimilar;
        int similarityCoeffMatt[]=new int[8];
        Scanner scanner=new Scanner(System.in);
        for(int i=0;i<9;i++)
        {
            mSqIn[i]=scanner.nextInt();
        }
        for(int j=0;j<8;j++)
            {
              varSimilar=0;
              for(int p=0;p<9;p++)
                  {
                    
                       varSimilar+=Math.abs(mSq[j][p]-mSqIn[p]); 
                   }
              similarityCoeffMatt[j]=varSimilar;
            }
        int maxSimilarity=similarityCoeffMatt[0];
         for(int q=0;q<8;q++)
             {
               if(maxSimilarity>similarityCoeffMatt[q])    
               {
                   maxSimilarity=similarityCoeffMatt[q];
               }
             }
        System.out.println(maxSimilarity);
        
    }
}