필요�?서식 자료 역시 서식 자료실을 통해�?무료�?내려받을 �?있다�?합니�? If a grammatical theory that is certainly extra to 서툴�?is a vowel �?and there is no other choice besides a vowel �?then that grammatical principle can't be added to 서툴�? It really is incorrect to add any grammatical