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) {
        final int N = 3;
        final int M = 15;
        Scanner scan = new Scanner(System.in);
        int[][] s = new int[N][N];
        for(int i = 0; i < N; i++) {
            for(int j = 0; j < N; j++) {
                s[i][j] = scan.nextInt();
            }    
        }
        final int center = 5;
        final int[][] borders = {{4,9,2,7,6,1,8,3},{4,3,8,1,6,7,2,9}};
        
        int[] totalCosts = new int[8];
        for(int i = 0;i < 8; i++) {
            int rem = i % 2;
            totalCosts[i] = Math.abs(s[1][1] - center);
            totalCosts[i] += Math.abs(s[0][0] - borders[rem][(0+i-rem) % 8]);
            totalCosts[i] += Math.abs(s[0][1] - borders[rem][(1+i-rem) % 8]);
            totalCosts[i] += Math.abs(s[0][2] - borders[rem][(2+i-rem) % 8]);
            totalCosts[i] += Math.abs(s[1][2] - borders[rem][(3+i-rem) % 8]);
            totalCosts[i] += Math.abs(s[2][2] - borders[rem][(4+i-rem) % 8]);
            totalCosts[i] += Math.abs(s[2][1] - borders[rem][(5+i-rem) % 8]);
            totalCosts[i] += Math.abs(s[2][0] - borders[rem][(6+i-rem) % 8]);
            totalCosts[i] += Math.abs(s[1][0] - borders[rem][(7+i-rem) % 8]);
        }
        
        int minCost = totalCosts[0];
        for(int cost : totalCosts) {
            if(cost < minCost) minCost = cost;
        }
        System.out.printf("%d", minCost);
    }
}