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) {
        Scanner input = new Scanner(System.in);
        int[] inSquare = new int[9];
        for(int i = 0; i < 9; i++){
            inSquare[i] = input.nextInt();
        }
        int[][] squares = new int[][]{{8,1,6,3,5,7,4,9,2,0}, {4,3,8,9,5,1,2,7,6,0}, {2,9,4,7,5,3,6,1,8,0}, {6,7,2,1,5,9,8,3,4,0}, {4,9,2,3,5,7,8,1,6,0}, {8,3,4,1,5,9,6,7,2,0}, {6,1,8,7,5,3,2,9,4,0}, {2,7,6,9,5,1,4,3,8,0}};
        for(int a = 0; a < 8; a++){
            for(int i = 0; i < 9; i++){
                squares[a][9] += 
                    Math.abs(squares[a][i] - inSquare[i]);
            }
        }
        int cost = squares[0][9];
        for(int k = 1; k < 8; k++){
            if(squares[k][9] < cost){
                cost = squares[k][9];
            }
        }
        System.out.println(cost);
    }
}