a-ak a-ok aaaa aaab aaar aaba aabb aaka aaoo aara aaro abaa abab abaj abak abar abb- abba abbb abbo abbr aboa abob abok aboo abor abra abro ajab ajak ajao ajar ajba ajka ajob ajoo akaa akao akar akka akko akok akr- akra aoba aora aorb arab arak arar arba arja arjo arka arko aroa arob aroo aror arr- arra arrk arro arrr baaa baak baar baba babb babo babr baja bak- baka bako bakr bar- bara barb bark baro barr bbbb bjoa boab boak boar boba bobb bobo bojo boka boko boob book boor bor- bora borj bork boro borr brab braj brak brao brka brkb broa brob brok broo bror brrr j-ro jaak jaar jaba jabo jabr jaja jaka jako jara jark jaro jarr jbaa jbar jbob jjar joab joao joar joba jobo jojo joka jokb jook joor jora jork joro jrbr kaaa kaab kaak kaar kaba kabb kabo kabr kaja kajb kajk kajo kajr kaka kakj kakk kako kaoa kaok kaor kara karb karj kark karo karr kbaa kbab kbak kbar kbba kbbb kbbk kbbo kbbr kbja kbjk kbkb kbkk kbko kbkr kboa kbob kbok kboo kbra kbrb kbrj kbrk kbro kjaa kjak kjbb kjbr kjjj kjjk kjjo kjjr kjkj kjkk kjoj kjok kjor kjrb kkaa kkar kkba kkbb kkbj kkbo kkbr kkjb kkjk kkkj kkkk kkoa kkob kkoj kkoo kkor kkrb kkrk kkro kkrr koab koak koar koba kobb kobk kobo kobr koja kojb kojo koka kokb kokk koko kokr koob kook kooo koor kora korb kork koro korr krab kraj krak krar krba krbb krbk krbr krjb krjk krjo krka krkk krko krkr kroa krob krok kroo kror krrb krrk krro krrr oara obak obba obbo obja obkb obok obor obra obro ojak ojok okak okja okka okko okok okor okra okro ooaa ooak ooba oooo oora orab orak orao orar orba orbb orbo orka orko oro- orok oror orra orro raab raaj raak raba rabb rabk rabo raja rajo raka rakk raob raok rara rarb rark raro rbbb rbbr roab roak roar rob- roba robb robo roja rojo roka rokk roko rokr roob rook roor rora rork roro rrrr