aaaa aaab aaap aaar aaas aaav aaba aabb aabp aaoo aapa aapo aaps aara aaro aarp aars aasa aass aava abaa abab abap abar abas abb- abba abbb abbo abbr abbs aboa abob aboo abor abos abov abpa abpp abpr abps abra abro abrs abs- absa absp abss abva abvp 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 apsv arab arap arar aras arba arbs aroa arob aroo aror aros arpa arps arr- arra arro arrr arrs ars- arsa arso arva arvo asaa asab asao asap asar asas asba asbo asob asop asor asos aspa aspo aspr asps asra asro asrs assa asso assp assr asss asva asvs avab avao avar avas avor avos avra avro avva avvo baaa baar baas baba babb babo babr babs baos bapa bapp baps bar- bara barb baro barr bars basa baso bass bava 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 bova bovo bpsa brab brao bras brav broa brob broo bror bros brrr brrs brsb brsr bsaa bsap bsas bsos bspp bspr bsra oaps oara oars oass oavs obas obba obbo obor obos obra obro obsr obss obvs ooaa ooba oooo ooos oops oora oosa opap opar opo- opor opos oppa oppo opps opra opsa orab orao orar oras orav orba orbb orbo orbs oro- oror oros orps orra orro orrs orsa orso orvr orvs osap osar osas osba osbp osoo osor osos osov osro ossa ossb osso ovar ovo- ovoo ovpp ovra paap paar paas paba paos papa papb papp papr paps par- para paro parp parr pars parv pasa paso pasp pass pava pavo pavs 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 povo povs ppap ppar ppbv ppoa ppos pppa pppo pppp ppps ppss prao prar pras prbs pro- proa prob proo prop pros prov prps prrs prsa prso prss prsv psap psas psav psbr psoa psos psov pspp pspr psps psrp pssa psso pvpa pvsa raab raas raba rabb rabo rabs raob raop raos rapa rapp raps rara rarb raro rars rasa raso rasp rass rava 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 rova rovo rovs rpob rpos rpps rras rrrr rrsp rsaa rsos rspb rspo rsps rssa rsvp rvsp s-os saab saap saar saas saba sabb sabo sabr sabs saor saos sapa sapo sapp saps sara saro sarp sarr sars sarv sasa saso sass sava savo savs 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 sosv sova sovo sovs sp-a spap spar spas spoo spop spor spos spps spro sprs spsa spso spsp spss spva sras sros srps srsp ssaa ssab ssao ssap ssas ssbr ssop sspa sspo ssps ssra ssrs sssa sssb ssss ssvp svar svor vaar vaas vabs vapa vapb vara varp varr vars vas- vasa vaso vasp vass vava vavs voar voor vor- vora voro vors vosa voso voss vpro vrap vras vrav vrba vrsa vsop vsrp vvob vvpb vvsb vvvv