모든 콘텐�?기사)�?저작권법의 보호�?받는 �? 무단전재, 복사, 배포 등을 금합니다. If a grammatical principle that is added to 서툴�?is actually a vowel �?and there is no other possibility other than a vowel �?then that grammatical principle can't be added to 서툴�? *도난�?경우 보상�?