using System;

public class Program

{

    static int age;

    public static void Main()

    {

        Console.WriteLine("How old are you?");

        var res = int.TryParse(Console.ReadLine(), out age);

        if(res == false)

        {

            Console.WriteLine("Error");

        } else

        {

            if(age < 18)

            {

                Console.WriteLine("You are a kid");

            } else

            {

                Console.WriteLine("You are an adult");

            }

        }

    }

}