aaaa aaab aaap aaar aaba aabb aabp aabt aaoo aapa aapo aapt aara aaro aarp aart aaru aata aatt aaup abaa abab abap abar abat abau abb- abba abbb abbo abbr abbt aboa abob aboo abor abot abou abpa abpp abpr abra abro abta abtu abua abut aoba aopo aora aorb aort aout apao apap apar apat apba apbr apo- apoo apop apor apot apou appa appr appt appu apra apro aprt apta aptt apua apup arab arap arar arat arau arba aroa arob aroo aror arpa arpu arr- arra arro arrr arrt arru arta arto artr arua arub arup arut at-t ataa atab atap atar atat atob atop ator atot atpr atra atro atrp atru atta atto attp attr attu atua atub atur auaa aur- aura auro aut- auto baaa baar baat baba babb babo babr babu bapa bapp bapt bapu bar- bara barb baro barr bart baru bata bato batt batu bau- baur bbau bbbb bbpr boab boar boat boba bobb bobo bobu boob boop boor boot bopa bopp bor- bora boro borr bort boru bota botb boto bott boua boup bour bout bpot brab brao brat brau broa brob broo bror brot brou brrr brup brut btaa btbp btob btor btrt bttb buar buat buba bubb bubo bubu bupa bur- bura burb buro burp burr burt buru but- buta buto butt oaau oara obba obbo obor obot obra obro ooaa ooba oooo oora oort ootb ootp opap opar opo- opor oppa oppo opra opto opua orab orao orar orat orba orbb orbo orbu oro- oror orot orra orro orta orto orub orup otap otar oto- otoo otor otpp otra otro otta otto ottu otur ouat oupa our- oura ouro ourt out- outa outb outo ouu- paap paar paat paba pabt pabu papa papb papp papr par- para paro parp parr part paru pata pato patr patt patu paua paup paur paut pbar pbpa poar poat poba pobo poop poor poot pop- popa popo popp popt pora porb poro porr port pota poto pott potu poup pour pout ppap ppar ppoa pppa pppo pppp ppru ppta pptt ppur prao prar prat prau pro- proa prob proo prop prot prou prtp prtr prut pruu ptab ptop puao puar pubu pupa pupu pur- pura purb puro purp purr puru put- puta puto putt putu raab raat raba rabb rabo rabu raob raop rapa rapp rapt rara rarb raro rata rato ratp ratt ratu raua raub raup raut rbbb rbbr roab roap roar roat rob- roba robb robo robt robu roob roop roor root ropa ropo rora roro rort roru rota roto rotr rott roua roub roup rout rpob rpta rrat rrrr rtpa rttp ruba rubb rubp rubu rupa rupp rupt rura ruro rurp ruru ruta ruto rutt rutu taa- taar taat taba tabb tabo tabu taoa taor taou tapa tapo tapp tapr tapt tapu tara tarb taro tarp tarr tart taru tata tatb tato tatr tatt tatu taua taub taur taut tbar tbrb tbta tbtp toab toat toau toba tobo tobt tobu tooa toor toot top- topa topo topp topt topu tora toro torp torr tort toru tota toto totr tott toup tour tout tpap tpau tppa tppp tppr tptp tptr tput traa trab trao trap trat trau troa troo trop trot trou trpa trpp trra trtr trub trut truu ttab ttbb ttop tttt tuao tuar tuat tuba tubb tubo tubr tubu tuor tupa tupo tupu tura turb turo turp turr turt turu tuta tuto tutt tutu tuuo u-rp uart uaru uata uatu uaua ubar ubba ubbo ubra uor- upar upat upor uppa uppp uppu upra upto upup urao urap urat urau urba uro- uroa uroo urpo urra urup urur urut utau utor utpa utto uttu uuta uuuu