aaaa aaab aaar aaba aabb aabt aaoo aara aaro aart aaru aata aatt abaa abab abar abat abau abb- abba abbb abbo abbr abbt aboa abob aboo abor abot abou abra abro abta abtu abua abut aoba aora aorb aort aout aqar aqra aqu- aqua aquo arab araq arar arat arau arba aroa arob aroo aror arq- arqa arr- arra arro arrr arrt arru arta arto artr arua arub aruq arut at-t ataa atab ataq atar atat atob ator atot atra atro atru atta atto attr attu atua atub atur auaa aur- aura auro aut- auto baaa baar baat baba babb babo babr babu baqa baqt bar- bara barb baro barq barr bart baru bata bato batt batu bau- baur bbau bbbb bbbq boab boar boat boba bobb bobo bobu boob boor boot bor- bora boro borr bort boru bota botb boto bott boua bour bout brab brao brat brau broa brob broo bror brot brou brrr brut btaa btob btor btrt bttb buar buat buba bubb bubo bubq bubu buqa bur- bura burb buro burr burt buru but- buta buto butt oaau oara obba obbo oboq obor obot obra obro ooaa ooba oooo oora oort ootb orab orao orar orat orba orbb orbo orbu oro- oror orot orra orro orta orto orub otar oto- otoo otor otra otro otta otto ottu otur ouat our- oura ouro ourt out- outa outb outo outq ouu- qabo qara qaru qobu qoob qqqq qtar quaa quab quar quat quba qubo quob quor quot quro qutb quu- raab raat raba rabb rabo rabu raob raqt rara rarb raro rata rato ratt ratu raua raub raut rbbb rbbr roab roar roat rob- roba robb robo robt robu roob roor root rora roro rort roru rota roto rotr rott roua roub rout rrat rrrr ruba rubb rubu rura ruro ruru ruta ruto rutt rutu taa- taar taat taba tabb tabo tabu taoa taor taou taqa taqu tara tarb taro tarq tarr tart taru tata tatb tato tatr tatt tatu taua taub taur taut tbar tbrb tbta toab toat toau toba tobo tobt tobu tooa toor toot tora toro torq torr tort toru tota toto totr tott tour tout traa trab trao trat trau troa troo trot trou trra trtr trub trut truu ttab ttbb tttt tuao tuar tuat tuba tubb tubo tubr tubu tuor tura turb turo turr turt turu tuta tuto tutt tutu tuuo uart uaru uata uatu uaua ubar ubba ubbo ubra uor- uqao uqar uqat urao urat urau urba uro- uroa uroo urra uruq urur urut utau utor utto uttu utuq uuta uuuu