이 름 전자우편 홈페이지 제목 비밀번호 (최소 4자이상의 영문 또는 숫자) the first do the test worked because you failed to notice something that you should have noticed (and you felt surprised and shocked that you didn't). like when you're driving and you don't notice a cyclist. not sure this one is any cleverer than a spot the difference competition