using System;

public class Program

{

    public static void Main()

    {

        Console.WriteLine("One is an error code: " +  IsErrorCode(1).ToString());

        Console.WriteLine("Five is an error code: " +  IsErrorCode(5).ToString());

        Console.WriteLine("Nine is an error code: " +  IsErrorCode(9).ToString());      

        Console.WriteLine("Ninety Nine!! Ithink this is an error code: " +  IsErrorCode(99).ToString());

    }

    public static bool IsErrorCode(int errorCode){

        return !(errorCode==1 ||errorCode==5 || errorCode==9) ;

    }

}