a-ak a-ha a-ok aaaa aaab aaah aaar aaba aabb aabh aaha aahk aaka aaoo aara aaro abaa abab abak abar abb- abba abbb abbo abbr abha abho abhr aboa abob aboh abok aboo abor abra abro ahab ahah ahar ahha ahoa ahok ahor ahra ahrr akaa akah akao akar akha akka akko akok akr- akra aoah aoba aora aorb arab arah arak arar arba arbh arh- arka arkh arko aroa arob aroo aror arr- arra arrh arrk arro arrr baaa baah baak baar baba babb babo babr baha baho bahr bak- baka bakh bako bakr baoh bar- bara barb barh bark baro barr bbbb bhao bhar bhor bhra boab boak boar boba bobb bobo boha boho bohr boka boko boob booh book boor bor- bora borh bork boro borr brab brah brak brao brka brkb broa brob broh brok broo bror brrr haab haak haar haba habo haha haho haka hakk hako haor hara harh hark haro harr hbar hhaa hhhh hoar hoba hobo hoha hoho hoka hoko hook hoor hora hork horo horr hrob kaaa kaab kaak kaar kaba kabb kabo kabr kaha kaho kahr kaka kakh kakk kako kaoa kaok kaor kara karb kark karo karr kbaa kbab kbak kbar kbba kbbb kbbk kbbo kbbr kbhb kbhh kbhr kbkb kbkk kbko kbkr kboa kbob kbok kboo kbra kbrb kbrh kbrk kbro khab khak khao khar khbr khhk khho khka khkk khkr khoa khob khok khor khra khrk khro khrr kkaa kkar kkba kkbb kkbo kkbr kkha kkhb kkhh kkhk kkhr kkkk kkoa kkob kkoh kkoo kkor kkrb kkrh kkrk kkro kkrr koab koak koar koba kobb kobk kobo kobr koha kohh koho kohr koka kokb kokh kokk koko kokr koob kook kooo koor kora korb kork koro korr krab krah krak krar krba krbb krbk krbr krka krkh krkk krko krkr kroa krob kroh krok kroo kror krrb krrk krro krrr oara obak obba obbo obkb obok obor obra obrh obro ohba ohho ohob ohoh ohok ohra okak okha okka okko okok okor okra okro ooaa ooak ooba ooha ooho oooh oooo oora orab orah orak orao orar orba orbb orbo orka orko oro- orok oror orra orro raab raak raba rabb rabk rabo raha rahr raka rakk raob raoh raok rara rarb rark raro rbbb rbbr rboh rhoa rhob rhoh roab roak roar rob- roba robb robo roha rohr roka rokh rokk roko rokr roob rook roor rora rork roro rrah rrrr