a-ak a-ok aaaa aaab aaap aaar aaas aaba aabb aabp aaka aaoo aapa aapo aaps aara aaro aarp aars aasa aass abaa abab abak abap abar abas abb- abba abbb abbo abbr abbs aboa abob abok aboo abor abos abpa abpp abpr abps abra abro abrs abs- absa absp abss akaa akao akap akar akas akka akko akok akos akpo akr- akra aksa aoba aokp aoks aopo aora aorb aors aosp aoss apak apao apap apar apas apba apbr apbs apo- apoo apop apor apos appa appr apps apra apro aprs apsa apso apss arab arak arap arar aras arba arbs arka arko arks aroa arob aroo aror aros arpa arps arr- arra arrk arro arrr arrs ars- arsa arsk arso asaa asab asak asao asap asar asas asba asbo aska asko askr asks asob asok asop asor asos aspa aspo aspr asps asra asro asrs assa assk asso assp assr asss baaa baak baar baas baba babb babo babr babs bak- baka bako bakr baks baos bapa bapp baps bar- bara barb bark baro barr bars basa bask baso bass bbas bbbb bbbs bbpr bkpr bksp boab boak boar boas boba bobb bobo bobs boka boko boks boob book boop boor boos bopa bopp bops bor- bora bork boro borr bors bosa bosk boso boss bpsa brab brak brao bras brka brkb broa brob brok broo bror bros brrr brrs brsb brsr bsaa bsap bsas bsos bspp bspr bsra k-os kaaa kaab kaak kaap kaar kaas kaba kabb kabo kabr kaka kakk kako kaks kaoa kaok kaor kaos kap- kapa kapo kapp kaps kara karb kark karo karp karr kars kas- kasa kasb kask kaso kasp kasr kass kbaa kbab kbak kbap kbar kbas kbba kbbb kbbk kbbo kbbr kbbs kbkb kbkk kbko kbkr kboa kbob kbok kboo kbos kbpa kbpk kbpo kbpr kbps kbra kbrb kbrk kbro kbsa kbsb kbsk kbso kbsr kbss kkaa kkap kkar kkba kkbb kkbo kkbr kkbs kkkk kkoa kkob kkoo kkor kkpk kkps kkrb kkrk kkro kkrr kkrs kksa kksp kksr kkss koab koak koap koar koas koba kobb kobk kobo kobr kobs koka kokb kokk koko kokp kokr koks koob kook kooo koop koor koos kopa kopb kopp kopr kops kora korb kork koro korr kors kos- kosa kosb koso kosp kosr koss kpak kpao kpar kpas kpba kpbb kpbr kpbs kpkk kpkr kpoa kpob kpok kpoo kpop kppk kppo kppp kppr kprb kprk kpro kprp kprr kprs kpso kpsp krab krak krap krar kras krba krbb krbk krbr krka krkk krko krkr krks kroa krob krok kroo krop kror kros krpa krpr krps krrb krrk krro krrr krrs krsa krsk krsr krss ksab ksak ksar ksas ksba ksbp ksbr ksbs kska kskb kskk ksko kskr ksks ksob ksok ksoo ksop ksor ksos kspa kspb kspk kspo kspr ksps ksra ksrb ksro ksrp ksrr ksrs kssa ksso kssr ksss oaks oaps oara oars oass obak obas obba obbo obkb obok obor obos obra obro obsr obss okak okap okas okka okko okok okor okpo okra okro oksa okso ooaa ooak ooba oooo ooos oops oora oosa opap opar opo- opor opos oppa oppo opps opra opsa orab orak orao orar oras orba orbb orbo orbs orka orko oro- orok oror oros orps orra orro orrs orsa orsk orso osak osap osar osas osba osbp osoo osor osos osro ossa ossb osso paak paap paar paas paba paka pako paks paos papa papb papp papr paps par- para park paro parp parr pars pasa pask paso pasp pass pbar pbpa pbpk pbrs pbsa pbsp poak poar poas poba pobo pobs poka poko pook poop poor poos pop- popa popo popp pops pora porb pork poro porr pors posa posb posk 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 psrk psrp pssa psso raab raak raas raba rabb rabk rabo rabs raka rakk raob raok raop raos rapa rapp raps rara rarb rark raro rars rasa rask raso rasp rass rbbb rbbr rbbs rbsp rbss rkos rkss roab roak roap roar roas rob- roba robb robo robs roka rokk roko rokr roks roob rook roop roor roos ropa ropo rops rora rork roro rosa roso rosp ross rpob rpos rpps rras rrrr rrsp rsaa rsos rspb rspk rspo rsps rssa s-os saab saak saap saar saas saba sabb sabo sabr sabs saka sakb sakk sako saks saor saos sapa sapo sapp saps sara sark saro sarp sarr sars sasa sask saso sass sbaa sbar sbas sbbs sbor sbrk sbsa sbsp skab skap skar skop skor skpo skra skss soak soap soar soas soba sobo sobp sobr sobs soka sokk soko sook soop soor soos sopa sopo sopp sops sora sorb soro sorr sors sosa soso soss sp-a spak spap spar spas spkr spok 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