using System;
public class Program
{
public static void Main()
Console.WriteLine("N=");
var n = int.Parse(Console.ReadLine());
if (n >= 2 && n <= 27);
for (int i = 1; i <= 999; i++);
(889%10 - > 9);
(899/10 ->89%10->9);
(899/100->8);
}