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 scan = new Scanner(System.in);
	        int [] grid = new int[9];
            
            int [] costs = new int[8];
            
        int [][] squares = new int [][] {
            {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},
            {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}};
	        
	        for (int i = 0; i < 9; i++){
	            grid[i] = scan.nextInt();
                for (int j = 0; j < 8; j++){
                    costs[j] += Math.abs(grid[i]-squares[j][i]);
                }
	        }
            Arrays.sort(costs);
	        System.out.println(costs[0]);
	       
    }
}