< word, salute, book < activity (mind and activity)

• 13155(document) ← 13160(book) → 13161(menu, lunar calendar)

< without fail, probably, how < activity (others)

• 43140(if, how) ← 43160 → 43200(uh, excuse me, hello)
• ㄱ ㄴ ㄷ ㄹ ㅁ ㅂ ㅅ ㅇ ㅈ ㅊ ㅋ ㅌ ㅍ ㅎ
• a b c d e f g h i j k l m n o p q r s t u v w x y z