a-fu a-ii aaaa aaab aaaf aaai aaar aaba aabb aabi aafa aafb aaff aafi aaib aaii aaoo aara aari aaro aaru abaa abab abaf abai abar abau abb- abba abbb abbi abbo abbr abff abia abib abir abiu aboa abob abof aboo abor abou abra abri abro abua abuf afaa afao afar affa affi affo afia afib afif afir afoa afoo afor afr- afra afri afro afru afua aiai aiba aibo aiff aiia aiib aiir aioi aira airi airo aiui aoba aora aorb aouf arab araf arai arar arau arba arbi arfa arfb arff arfu aria arib arif arii ario aroa arob aroi aroo aror arr- arra arri arro arrr arru arua arub arui auaa aufi aur- aura auri auro ba-i baaa baaf baar baba babb babi babo babr babu baff bafo baia baib baio bair bar- bara barb barf bari baro barr baru bau- bauf baur bbau bbbb biaf biao biar biba bibb bibi bibo bifa biff bifi bio- bioi biou bira birb biri biro birr biru boab boai boar boba bobb bobi bobo bobu bofa boff bofu boi- boii boiu boob boof boor bor- bora borf bori boro borr boru boua bouf bour brab braf brai brao brau brfu bria brio broa brob broo bror brou brrr buar buba bubb bubi bubo bubu buff bufo bufr buif buir buiu bur- bura burb buri buro burr buru faaa faba fabi fabo fabu fafa faff fafi fafo faio fair fara farb faro farr faru faur fbar ffar ffff ffii ffrr fiaa fiaf fiar fiba fifa fiff fifi fifo fiii fior fira fiua foaf foar foba fofo foia foof for- fora forb fori foro forr foua four frab frau fria frib frio frob frou frub fuar fubb fubu fuff fufu fuir fuor fur- fura furi furo furr iaaa iaai iaba iaff iaia iara iaru ibar ibfi ibia ibra ibri ibro ifaa ifao ifar ifbb ifor ifra ifrb ifrf ifri iifa iiii iiio iioi iioo iira ioba iobi ioii ioio ioof iooi iooo iora iori iraf irai irao irar irfu iri- iria irio irob irra irri iuiu iura oaau oafo oara obai obba obbo obia oboi obor obra obri obro off- offa offo offr offu ofor ofra oiba oiii oira ooaa ooba oobi ooff ooia oooo oora orab orai orao orar orba orbb orbi orbo orbu orff orfi orfu ori- oria orif orio oro- orof oror orra orri orro orub ouff ouii ouir our- oura ouro ouu- raab raaf raba rabb rabi rabo rabu rafa raff rafi raia raif raii rair raiu raob rara rarb rarf rari raro raua raub rauf rbaf rbbb rbbr riaa riab riai riau rib- riba ribo ribu rifa riff rifu riia riif riou riri roab roaf roar rob- roba robb robi robo robu roff rofo roia roif roio roir roiu roob roof rooi roor rora rori roro roru roua roub rouf rrif rrrr ruba rubb rubi rubu rufa ruff rufo ruif rura ruri ruro ruru uafa uair uaru uaua ubar ubba ubbi ubbo ubii ubir ubra uffa ufra uira uirr uofa uofo uor- urai urao urau urba urbi urfa urff urfi uria urib urif uriu uro- uroa uroo urra urri urur uuri uuuu