a-ii aaaa aaab aaac aaai aaap aaas aaba aabb aabc aabi aabp aaca aacb aacc aaci aacp aacs aacu aaib aaic aaii aais aapa aapc aapi aaps aasa aasc aasi aass aasu aaup aaus abaa abab abac abai abap abas abau abb- abba abbb abbi abbs abca abcb abcc abci abcp abcs abia abib abic abis abiu abpa abpc abpi abpp abps abs- absa absi absp abss absu abua abus acaa acab acac acai acap acas acba acca accc acci accp accs accu aci- acia acic acip acis acpa acpi acps acpu acsa acsc acsi acss acu- acup acus aiai aias aiba aica aicc aicp aics aiia aiib aiic aipa aipi aips aisa aisb aisi aiui apac apai apap apas apba apbs apca apcb apcc apcs api- apia apic apip apis appa appc apps appu apsa apsi apss apsu apua apuc apup apus asaa asab asac asai asap asas asau asba asbu asc- asca ascb ascc asci ascp asia asic asii asip asis aspa aspc aspi asps assa assc assi assp asss assu asub asui asus auaa auca auci aucp auis aupc aups ausa ausu ba-i baaa baas baba babb babi babs babu bac- baca bacc baci bacs baia baib baic bais bapa bapc bapi bapp baps bapu basa basc basi bass basu bau- bbas bbau bbbb bbbs bbci bcaa bcap bcas bcbc bcbp bcbs bcca bccc bcci bccs bcia bcis bcpp bcps bcsa bcsc bcss bcuc bcup biap bias biba bibb bibi bibs bica bicc bici bics biis bipa bipp bips bipu bis- bisa bisc bisp biss bisu bpai bpcp bpsa bpsu bsaa bsac bsap bsas bsci bscp bscs bsic bspp bssc bsup buba bubb bubi bubs bubu buca bucc buci bucs bucu buic buis buiu bupa bupc bups busa busc busi buss busu buus caaa caab caac caap caas caba cabi cabs cabu cac- caca cacc caci caia caib caic caip cais caiu capa capb capc capi capp caps capu casa casb casc casi casp cass casu cauc caup caus cbac cbbc cbbs cbca cbcc cbcp cbcs cbcu cbia cbpc cbpp cbsa cbsc cbsi cbus ccaa ccab ccac ccai ccap ccas ccba ccbc ccca cccb cccc ccci cccp cccs cccu ccic ccii ccip ccis ccpa ccpp ccps ccsa ccsi ccsp ccss ccuc ccup ccus ciaa cias ciau ciba cibc cibi cica cicc cici cics cicu ciia ciii ciis cipa cipp cips cis- cisa cisc cisp ciss ciuc ciup cius cpaa cpac cpap cpas cpbc cpca cpcs cpcu cpia cpic cppa cpps cpsa cpsc cpsu cpus csaa csab csac csas cscb cscc csci cscs csia csib csis cspa cspb cspc cspi csps cssa csua csup csus cuau cub- cuba cubb cubi cubs cuca cucc cuci cui- cuis cupp cups cusa cusb cusp cuss cusu iaaa iaac iaai iaap iaas iaba iaca iacc iacp iacs iacu iaia iais iapa iapp iaps iapu iasa iasc iasi iasp ibac ibas ibca ibcs ibia ibis ibsa ibss ibus icaa icab icac icai icap icas icbc icbp icbs icca iccb iccc icci iccp iccs iccu icis icpa icpc icps icsa icsb icsc icsi icsp icss icub icup icus iiac iias iica iiii iiis iipa iisc iisi iisp iisu iiuc ipac ipas ipba ipca ipcc ipcs ippa ippc ipsa ipsc ipsi ipsp ipss ipus is-a isac isai isas isba isca iscc isci iscp iscs iscu isia isic isis ispa ispc isps issa issc issi issp isss issu isua isup isus iucc iuiu iupa iupp iuss paap paas paba pabu paca paci pacs pacu paia paib paip pais papa papb papi papp paps pasa pasc pasi pasp pass paua paup paus pbac pbcc pbpa pbsa pbsp pcaa pcap pcas pcba pcbc pcbs pcca pccc pccs pcia pcip pcpb pcpp pcps pcsa piai pias piau pibb pibi pica picc pici pics picu piia piip pipa pipi pipp pips pisa pisi piss pisu pius ppac ppap ppcc ppci ppcs ppib ppic pppa pppp ppps ppss psac psap psas psca psci pscu psia psip psis pspi pspp psps pssa pssc puas pubs pubu puca puis puiu pupa pupi pups pupu pusa pusi puss puuc s-ib s-ic s-ii sa-c saab saac saap saas saba sabb sabc sabi sabs sabu saca sacc saci sacs sacu saia saic saip sais sapa sapi sapp saps sasa sasc sasi sass saua sauc saup saus sbaa sbac sbai sbas sbbs sbca sbcc sbcs sbia sbic sbsa sbsi sbsp sbus scaa scab scac scai scap scas scba scbi sccc sccp sccs sci- scia scic scip scis scpa scpb scpi scps scsa scsc scsi scsu scua scub scup siaa siab siac siai sias siau siba sibc sibi sibs sibu sica sicc sici sicp sics sicu sipa sipc sipi sipp sips sisa sisc sisi siss sisu siui sius sp-a spac spap spas spau spca spcc spcs spia spib spic spip spis spps spsa spsp spss spui spus ssaa ssab ssac ssap ssas ssau ssca sscc ssci sscp sscs ssis sspa sspc ssps sssa sssb sssc sssi ssss suas sub- suba subb subi subs suc- succ suci sucs suis sup- supa supp sups sus- susa susi susp suss susu suus uabc uaca uasa uasp uaua ubac ubba ubbi ubic ubii ubis ubpc ucai ucas ucbc ucca ucci uccp ucpa ucpb ucsa ucsb ucsc ucsu ucua uica uipi upac upas upca upci upcs upic upis uppa uppc uppp uppu upsa upsc upsi upup us-a usaa usac usap usas usba usbc usbs usca uscc uscs usia usip usis uspa uspc uspp usps ussa ussb ussc usss ussu usua usui usus uucp uusi uuuu