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 in = new Scanner(System.in);
        int[] sample = new int[9];
        int[] costs = new int[8];
        for (int arr_i = 0; arr_i < 9; arr_i++) {
            sample[arr_i] = in.nextInt();
        }
        int[][] squares = {
            {4,9,2,3,5,7,8,1,6},
            {8,3,4,1,5,9,6,7,2},
            {6,1,8,7,5,3,2,9,4},
            {2,7,6,9,5,1,4,3,8},
            {2,9,4,7,5,3,6,1,8},
            {4,3,8,9,5,1,2,7,6},
            {8,1,6,3,5,7,4,9,2},
            {6,7,2,1,5,9,8,3,4}
        };
        for (int i = 0; i < 8; i++) {
            int cost = 0;
            for (int j = 0; j < 9; j++) {
                cost += Math.abs(sample[j] - squares[i][j]);
            }
            costs[i] = cost;
        }
        Arrays.sort(costs);
        System.out.println(costs[0]);
    }
}