arduous arduous arduous arduous arduous arduous arduous arduous arduous arduous arduous arduous arduous arduous arduous arduous arduous arduous arduous arduous arduous arduous arduous arduous arduous arduous arduous arduous arduous arduous arduous arduous arduous arduous arduous arduous arduous arduous arduous arduous arduous arduous arduous arduous arduous arduous arduous arduous arduous arduous arduous arduous arduous arduous arduous arduous arduous arduous arduous arduous arduous arduous arduous arduous arduous arduous arduous arduous arduous arduous arduous arduous arduous arduous arduous arduous arduous arduous arduous arduous arduous arduous arduous arduous arduous arduous arduous arduous arduous arduous arduous arduous arduous arduous arduous arduous arduous arduous arduous