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

public class Solution {

    public static void main(String[] args) {
        int[] m1 = {8,1,6,
                    3,5,7,
                    4,9,2};
        
        int[] m2 = {4,3,8,
                    9,5,1,
                    2,7,6};
        
        int[] m3 = {2,9,4,
                    7,5,3,
                    6,1,8};
        
        int[] m4 = {6,7,2,
                    1,5,9,
                    8,3,4};
        
        int[] m5 = {6,1,8,
                    7,5,3,
                    2,9,4};
        
        int[] m6 = {8,3,4,
                    1,5,9,
                    6,7,2};
        
        int[] m7 = {4,9,2,
                    3,5,7,
                    8,1,6};
        
        int[] m8 = {2,7,6,
                    9,5,1,
                    4,3,8};
        
        int[] s = new int[9];
        Scanner sc = new Scanner(System.in);
        int[] costs = new int[8];
        
        for(int i = 0; i < 9; i++) {
            s[i] = sc.nextInt();
        }
        
        for(int i = 0; i < 9; i++) {
            costs[0] += Math.abs(s[i] - m1[i]);
            costs[1] += Math.abs(s[i] - m2[i]);
            costs[2] += Math.abs(s[i] - m3[i]);
            costs[3] += Math.abs(s[i] - m4[i]);
            costs[4] += Math.abs(s[i] - m5[i]);
            costs[5] += Math.abs(s[i] - m6[i]);
            costs[6] += Math.abs(s[i] - m7[i]);
            costs[7] += Math.abs(s[i] - m8[i]);
        }
        
        Arrays.sort(costs);
        
        System.out.println(costs[0]);
    }
}