a-ii aaaa aaab aaac aaai aaap aaas aaba aabb aabc aabi aabp aaca aacb aacc aaci aacp aacs aaib aaic aaii aais aapa aapc aapi aaps aasa aasc aasi aass abaa abab abac abai abap abas abb- abba abbb abbi abbs abca abcb abcc abci abcp abcs abia abib abic abis abpa abpc abpi abpp abps abs- absa absi absp abss acaa acab acac acai acap acas acba acca accc acci accp accs aci- acia acic acip acis acpa acpi acps acsa acsc acsi acss aiai aias aiba aica aicc aicp aics aiia aiib aiic aipa aipi aips aisa aisb aisi apac apai apap apas apba apbs apca apcb apcc apcs api- apia apic apip apis appa appc apps apsa apsi apss asaa asab asac asai asap asas asba asc- asca ascb ascc asci ascp asia asic asii asip asis aspa aspc aspi asps assa assc assi assp asss ba-i baaa baas baba babb babi babs bac- baca bacc baci bacs baia baib baic bais bapa bapc bapi bapp baps basa basc basi bass bbas bbbb bbbs bbci bcaa bcap bcas bcbc bcbp bcbs bcca bccc bcci bccs bcia bcis bcpp bcps bcsa bcsc bcss biap bias biba bibb bibi bibs bica bicc bici bics biis bipa bipp bips bis- bisa bisc bisp biss bpai bpcp bpsa bsaa bsac bsap bsas bsci bscp bscs bsic bspp bssc caaa caab caac caap caas caba cabi cabs cac- caca cacc caci caia caib caic caip cais capa capb capc capi capp caps casa casb casc casi casp cass cbac cbbc cbbs cbca cbcc cbcp cbcs cbia cbpc cbpp cbsa cbsc cbsi ccaa ccab ccac ccai ccap ccas ccba ccbc ccca cccb cccc ccci cccp cccs ccic ccii ccip ccis ccpa ccpp ccps ccsa ccsi ccsp ccss ciaa cias ciba cibc cibi cica cicc cici cics ciia ciii ciis cipa cipp cips cis- cisa cisc cisp ciss cpaa cpac cpap cpas cpbc cpca cpcs cpia cpic cppa cpps cpsa cpsc csaa csab csac csas cscb cscc csci cscs csia csib csis cspa cspb cspc cspi csps cssa iaaa iaac iaai iaap iaas iaba iaca iacc iacp iacs iaia iais iapa iapp iaps iasa iasc iasi iasp ibac ibas ibca ibcs ibia ibis ibsa ibss icaa icab icac icai icap icas icbc icbp icbs icca iccb iccc icci iccp iccs icis icpa icpc icps icsa icsb icsc icsi icsp icss iiac iias iica iiii iiis iipa iisc iisi iisp ipac ipas ipba ipca ipcc ipcs ippa ippc ipsa ipsc ipsi ipsp ipss is-a isac isai isas isba isca iscc isci iscp iscs isia isic isis ispa ispc isps issa issc issi issp isss paap paas paba paca paci pacs paia paib paip pais papa papb papi papp paps pasa pasc pasi pasp pass pbac pbcc pbpa pbsa pbsp pcaa pcap pcas pcba pcbc pcbs pcca pccc pccs pcia pcip pcpb pcpp pcps pcsa piai pias pibb pibi pica picc pici pics piia piip pipa pipi pipp pips pisa pisi piss ppac ppap ppcc ppci ppcs ppib ppic pppa pppp ppps ppss psac psap psas psca psci psia psip psis pspi pspp psps pssa pssc s-ib s-ic s-ii sa-c saab saac saap saas saba sabb sabc sabi sabs saca sacc saci sacs saia saic saip sais sapa sapi sapp saps sasa sasc sasi sass sbaa sbac sbai sbas sbbs sbca sbcc sbcs sbia sbic sbsa sbsi sbsp scaa scab scac scai scap scas scba scbi sccc sccp sccs sci- scia scic scip scis scpa scpb scpi scps scsa scsc scsi siaa siab siac siai sias siba sibc sibi sibs sica sicc sici sicp sics sipa sipc sipi sipp sips sisa sisc sisi siss sp-a spac spap spas spca spcc spcs spia spib spic spip spis spps spsa spsp spss ssaa ssab ssac ssap ssas ssca sscc ssci sscp sscs ssis sspa sspc ssps sssa sssb sssc sssi ssss