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

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 matrixSol[][]={{4,9,2,3,5,7,8,1,6},{2,7,6,9,5,1,4,3,8},{6,1,8,7,5,3,2,9,4},{8,3,4,1,5,9,6,7,2},{2,9,4,7,5,3,6,1,8},{6,7,2,1,5,9,8,3,4},{8,1,6,3,5,7,4,9,2},{4,3,8,9,5,1,2,7,6}};
        Scanner scn=new Scanner(System.in);
        int matrix[]=new int[9];
        for(int i=0;i<9;i++)
            matrix[i]=scn.nextInt();
        int c=100;
        for(int[] a:matrixSol){
            if(chkVal(a,matrix)<c)
                c=chkVal(a,matrix);
        }
        System.out.println(c);
    }
    static int chkVal(int[] arr,int[] comp ){
        int c=0;
        for(int i=0;i<9;i++){
            c+=Math.abs(arr[i]-comp[i]);
        }
        return c;
    }
}