aaaa aaab aaap aaar aaas aaba aabb aabp aabt aaoo aapa aapo aaps aapt aara aaro aarp aars aart aasa aass aast aata aatt abaa abab abap abar abas abat abb- abba abbb abbo abbr abbs abbt aboa abob aboo abor abos abot abpa abpp abpr abps abra abro abrs abs- absa absp abss abta abts aoba aopo aora aorb aors aort aosp aoss apao apap apar apas apat apba apbr apbs apo- apoo apop apor apos apot appa appr apps appt apra apro aprs aprt apsa apso apss apta apts aptt arab arap arar aras arat arba arbs aroa arob aroo aror aros arpa arps arr- arra arro arrr arrs arrt ars- arsa arso arst arta arto artr arts asaa asab asao asap asar asas asat asba asbo asob asop asor asos asot aspa aspo aspr asps aspt asra asro asrs assa asso assp assr asss asst asta astb asto astp astr asts at-t ataa atab atap atar atas atat atbs atob atop ator atos atot atpr atra atro atrp atsb atst atta atto attp attr atts baaa baar baas baat baba babb babo babr babs baos bapa bapp baps bapt bar- bara barb baro barr bars bart basa baso bass bast bata bato bats batt bbas bbbb bbbs bbpr boab boar boas boat boba bobb bobo bobs boob boop boor boos boot bopa bopp bops bor- bora boro borr bors bort bosa boso boss bost bota botb boto bots bott bpot bpsa brab brao bras brat broa brob broo bror bros brot brrr brrs brsb brsr brst bsaa bsap bsas bsat bsos bspp bspr bsra bsts btaa btbp btob btor btps btrt btss bttb oaps oara oars oass oast oats obas obba obbo obor obos obot obra obro obsr obss obst obts ooaa ooba oooo ooos oops oora oort oosa oost ootb ootp oots opap opar opo- opor opos oppa oppo opps opra opsa opto opts orab orao orar oras orat orba orbb orbo orbs oro- oror oros orot orps orra orro orrs orsa orso orta orto orts osap osar osas osat osba osbp osoo osor osos osro ossa ossb osso osta ostr osts otap otar otas otbs oto- otoo otor otos otpp otra otro otrs otsa otso otta otto otts paap paar paas paat paba pabt paos papa papb papp papr paps par- para paro parp parr pars part pasa paso pasp pass past pata pato patr pats patt pbar pbpa pbrs pbsa pbsp poar poas poat poba pobo pobs poop poor poos poot pop- popa popo popp pops popt pora porb poro porr pors port posa posb poso poss post pota poto pots pott ppap ppar ppoa ppos pppa pppo pppp ppps ppss ppta ppts pptt prao prar pras prat prbs pro- proa prob proo prop pros prot prps prrs prsa prso prss prtp prtr psap psas psat psbr psbt psoa psos pspp pspr psps psrp pssa psso psst psts ptab ptas ptop ptsa raab raas raat raba rabb rabo rabs raob raop raos rapa rapp raps rapt rara rarb raro rars rasa raso rasp rass rast rata rato ratp rats ratt rbbb rbbr rbbs rbsp rbss rbst roab roap roar roas roat rob- roba robb robo robs robt roob roop roor roos root ropa ropo rops rora roro rort rosa roso rosp ross rost rota roto rotr rots rott rpob rpos rpps rpta rpts rras rrat rrrr rrsp rsaa rsos rspb rspo rsps rssa rstp rsts rtas rtpa rtps rtss rttp rtts s-os saab saap saar saas saat saba sabb sabo sabr sabs saor saos sapa sapo sapp saps sara saro sarp sarr sars sart sasa saso sass sast sata satb sato satr sats satt sbaa sbar sbas sbbs sbor sbot sbsa sbsp sbst soap soar soas soat soba sobo sobp sobr sobs sobt soop soor soos soot sopa sopo sopp sops sora sorb soro sorr sors sort sosa soso soss sost sota soto sotp sots sp-a spap spar spas spat spoo spop spor spos spot spps spro sprs spsa spso spsp spss spst spta sptb spto sptr spts sras sros srps srpt srsp srta srtp srtr ssaa ssab ssao ssap ssas ssat ssbr ssop ssot sspa sspo ssps sspt ssra ssrs sssa sssb ssss ssta sstb sstp ssts stab stap star stas stat stbs stoa stob stoo stop stor stos stot stpp stps stra stro strs stss sttr taa- taar taas taat taba tabb tabo tabs taoa taor taos tapa tapo tapp tapr taps tapt tara tarb taro tarp tarr tars tart tasa tasb tasp tasr tass tast tata tatb tato tatr tats tatt tbar tbas tbbs tbrb tbsp tbst tbta tbtp toab toas toat toba tobo tobs tobt tooa toor toos toot top- topa topo topp tops topt tora toro torp torr tors tort tosa tosb toso toss tost tota toto totr tots tott tpap tppa tppp tppr tprs tpsa tptp tptr traa trab trao trap tras trat troa troo trop tros trot trpa trpp trps trra trst trtr tsaa tsao tsar tsat tsob tsop tsos tspo tsps tspt tssa tssr tsst tsts ttab ttbb ttop ttss tttt