aaaa aaab aaap aaar aaas aaba aabb aabp aaoo aapa aapo aaps aara aaro aarp aars aasa aass abaa abab abap abar abas abb- abba abbb abbo abbr abbs aboa abob aboo abor abos abpa abpp abpr abps abra abro abrs abs- absa absp abss aoba aopo aora aorb aors aosp aoss apao apap apar apas apba apbr apbs apo- apoo apop apor apos appa appr apps apra apro aprs apsa apso apss arab arap arar aras arba arbs aroa arob aroo aror aros arpa arps arr- arra arro arrr arrs ars- arsa arso asaa asab asao asap asar asas asba asbo asob asop asor asos aspa aspo aspr asps asra asro asrs assa asso assp assr asss baaa baar baas baba babb babo babr babs baos bapa bapp baps bar- bara barb baro barr bars basa baso bass bbas bbbb bbbs bbpr boab boar boas boba bobb bobo bobs boob boop boor boos bopa bopp bops bor- bora boro borr bors bosa boso boss bpsa brab brao bras broa brob broo bror bros brrr brrs brsb brsr bsaa bsap bsas bsos bspp bspr bsra oaps oara oars oass obas obba obbo obor obos obra obro obsr obss ooaa ooba oooo ooos oops oora oosa opap opar opo- opor opos oppa oppo opps opra opsa orab orao orar oras orba orbb orbo orbs oro- oror oros orps orra orro orrs orsa orso osap osar osas osba osbp osoo osor osos osro ossa ossb osso paap paar paas paba paos papa papb papp papr paps par- para paro parp parr pars pasa paso pasp pass pbar pbpa pbrs pbsa pbsp poar poas poba pobo pobs poop poor poos pop- popa popo popp pops pora porb poro porr pors posa posb poso poss ppap ppar ppoa ppos pppa pppo pppp ppps ppss prao prar pras prbs pro- proa prob proo prop pros prps prrs prsa prso prss psap psas psbr psoa psos pspp pspr psps psrp pssa psso raab raas raba rabb rabo rabs raob raop raos rapa rapp raps rara rarb raro rars rasa raso rasp rass rbbb rbbr rbbs rbsp rbss roab roap roar roas rob- roba robb robo robs roob roop roor roos ropa ropo rops rora roro rosa roso rosp ross rpob rpos rpps rras rrrr rrsp rsaa rsos rspb rspo rsps rssa s-os saab saap saar saas saba sabb sabo sabr sabs saor saos sapa sapo sapp saps sara saro sarp sarr sars sasa saso sass sbaa sbar sbas sbbs sbor sbsa sbsp soap soar soas soba sobo sobp sobr sobs soop soor soos sopa sopo sopp sops sora sorb soro sorr sors sosa soso soss sp-a spap spar spas spoo spop spor spos spps spro sprs spsa spso spsp spss sras sros srps srsp ssaa ssab ssao ssap ssas ssbr ssop sspa sspo ssps ssra ssrs sssa sssb ssss