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

public class Solution {

    public static void main(String[] args) {
        int minCost = 45;
        int[][] sol = {{8,1,6,3,5,7,4,9,2},{6,1,8,7,5,3,2,9,4},
                {4,3,8,9,5,1,2,7,6}, {2,7,6,9,5,1,4,3,8},
                {2,9,4,7,5,3,6,1,8},{4,9,2,3,5,7,8,1,6},
                {6,7,2,1,5,9,8,3,4},{8,3,4,1,5,9,6,7,2}};
        Scanner sc = new Scanner(System.in);
        int[] input = new int[9];
        for (int i = 0; i < 9; i++) {
            input[i] = sc.nextInt();
        }

        for (int i = 0; i < 8; i++) {
            int cost = 0;
            for (int j = 0; j < 9; j++) {
               cost += Math.abs(input[j] - sol[i][j]);

            }
      
            minCost = (cost < minCost) ? cost : minCost;
        }

        System.out.println(minCost);


    }
}