이 름 전자우편 홈페이지 제목 비밀번호 (최소 4자이상의 영문 또는 숫자) I started doing them in the 60′s and found them a lot easier than now. Peak solving was in the 80′s when it used to take an average of 10- 15 minutes. These days it takes me hours – but I put that down to the compiler NOT my age!!