고지서를 받으�?송달지(실거주지)�?변경하실려�?서비스를 신청하여 주시�?바랍니다. If a grammatical principle that is definitely included to 서툴�?is really a vowel �?and there's no other possibility aside from a vowel �?then that grammatical principle can not be extra to 서툴�? 저작자 �