a-ak a-ha a-ok aaaa aaab aaah aaba aabb aabh aaha aahk aaka aaoo abaa abab abak abb- abba abbb abbo abha abho aboa abob aboh abok aboo ahab ahah ahha ahoa ahok akaa akah akao akha akka akko akok aoah aoba baaa baah baak baba babb babo baha baho bak- baka bakh bako baoh bbbb bhao boab boak boba bobb bobo boha boho boka boko boob booh book haab haak haba habo haha haho haka hakk hako hhaa hhhh hoba hobo hoha hoho hoka hoko hook kaaa kaab kaak kaba kabb kabo kaha kaho kaka kakh kakk kako kaoa kaok kbaa kbab kbak kbba kbbb kbbk kbbo kbhb kbhh kbkb kbkk kbko kboa kbob kbok kboo khab khak khao khhk khho khka khkk khoa khob khok kkaa kkba kkbb kkbo kkha kkhb kkhh kkhk kkkk kkoa kkob kkoh kkoo koab koak koba kobb kobk kobo koha kohh koho koka kokb kokh kokk koko koob kook kooo obak obba obbo obkb obok ohba ohho ohob ohoh ohok okak okha okka okko okok ooaa ooak ooba ooha ooho oooh oooo