a-ak a-ii a-ok aaaa aaab aaai aaar aaba aabb aabi aaib aaii aaka aaoo aara aari aaro abaa abab abai abak abar abb- abba abbb abbi abbo abbr abia abib abir aboa abob abok aboo abor abra abri abro aiai aiba aibo aiia aiib aiir aika aiki aiko aioi aira airi airo akaa akai akao akar akia akik akio akir akka akki akko akok akr- akra aoba aoki aora aorb arab arai arak arar arba arbi aria arib arii arik ario arka arki arko aroa arob aroi aroo aror arr- arra arri arrk arro arrr ba-i baaa baak baar baba babb babi babo babr baia baib baik baio bair bak- baka baki bako bakr bar- bara barb bari bark baro barr bbbb biak biao biar biba bibb bibi bibo biko bio- bioi bira birb biri birk biro birr boab boai boak boar boba bobb bobi bobo boi- boii boka boki boko boob book boor bor- bora bori bork boro borr brab brai brak brao bria brik brio brka brkb broa brob brok broo bror brrr iaaa iaai iaba iaia iara ibar ibia ibra ibri ibro iiii iiio iioi iioo iira ikar ikki ikko ikoo ikra ikri ioba iobi ioii ioio ioko iooi iooo iora iori irai irak irao irar iri- iria irio irka irki irob irra irri kaaa kaab kaai kaak kaar kaba kabb kabi kabo kabr kaia kaib kaii kaik kaio kair kaka kaki kakk kako kaoa kaoi kaok kaor kara karb kari kark karo karr kbaa kbab kbai kbak kbar kbba kbbb kbbi kbbk kbbo kbbr kbia kbib kbik kbio kbkb kbkk kbko kbkr kboa kbob kboi kbok kboo kbra kbrb kbri kbrk kbro kiab kiai kiar kiba kibb kibi kibo kibr kiia kiii kiik kika kiki kikk kiko kikr kioa kioi kiok kioo kira kirb kiri kirk kiro kirr kkaa kkai kkar kkba kkbb kkbi kkbo kkbr kkia kkik kkkk kkoa kkob kkoo kkor kkrb kkrk kkro kkrr koab koai koak koar koba kobb kobi kobk kobo kobr koii koir koka kokb koki kokk koko kokr koob kooi kook kooo koor kora korb kori kork koro korr krab krai krak krar krba krbb krbi krbk krbr kria krib krik krio krka krki krkk krko krkr kroa krob kroi krok kroo kror krrb krri krrk krro krrr oara obai obak obba obbo obia obkb oboi obok obor obra obri obro oiba oiii oiko oira okak okia okir okka okko okok okor okra okro ooaa ooak ooba oobi ooia oooo oora orab orai orak orao orar orba orbb orbi orbo ori- oria orio orka orko oro- orok oror orra orri orro raab raak raba rabb rabi rabk rabo raia raii raik rair raka raki rakk raob raok rara rarb rari rark raro rbbb rbbr riaa riab riai riak rib- riba ribo riia rika riki rikk riri roab roak roar rob- roba robb robi robo roia roik roio roir roka roki rokk roko rokr roob rooi rook roor rora rori rork roro rrrr