�?블로�?전체 카테고리 글 전체글 보기 화면 최상단으�?이동 If a grammatical theory that is certainly added to 서툴�?is actually a vowel �?and there's no other solution besides a vowel �?then that grammatical principle can not be included to 서툴�? If a grammatical principle that may be extra to 서둘