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[][] a=new int[][]{{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[] b=new int[9];
		Scanner input = new Scanner(System.in);
        int sol=45;
		for(int i=0;i<9;i++){
            b[i]=input.nextInt(); 
        }
        input.close();
        
        for (int i=0;i<8;i++){
        	int cc=0;
        	for(int j=0;j<9;j++){
        		cc=cc+(Math.abs(a[i][j]-b[j]));	
        	}
        	//System.out.println(cc);
        	if(cc < sol){
        		sol=cc;//finding least cost
        	}
        }
        System.out.println(sol);
     }
  }