a-ii aaaa aaab aaac aaai aaas aaba aabb aabc aabi aabt aaca aacb aacc aaci aacs aact aaib aaic aaii aais aasa aasc aasi aass aast aata aatc aatt abaa abab abac abai abas abat abax abb- abba abbb abbi abbs abbt abca abcb abcc abci abcs abct abia abib abic abis abit abs- absa absi abss abta abts ac-t acaa acab acac acai acas acat acba acca accc acci accs acct aci- acia acic acis acsa acsc acsi acss acst acta actc acti acts actt aiai aias aiba aica aicc aics aiia aiib aiic aisa aisb aisi aist aita aiti aits aitt aixa aixi asaa asab asac asai asas asat asba asc- asca ascb ascc asci asct ascx asia asic asii asis asit asix assa assc assi asss asst asta astb astc asti asts at-t at-x ataa atab atac atai atas atat atax atbs atca atcc atcs atia atic atis atit atsb atsc atsi atst atta atti atts axat axi- axia axis ba-i ba-x baaa baas baat baba babb babi babs bac- baca bacc baci bacs bact baia baib baic bais bait baix basa basc basi bass bast bata batc bati bats batt baxi baxt bbas bbbb bbbs bbci bcaa bcas bcat bcbc bcbs bcca bccc bcci bccs bcia bcis bcit bcsa bcsc bcss bctc bcts bias biat biba bibb bibi bibs bica bicc bici bics biis bis- bisa bisc biss bist bita bitc bits bitt bitx bixa bixi bsaa bsac bsas bsat bsci bscs bsic bsix bssc bsts btaa btcc btcs btcx btss bttb caaa caab caac caas caat caba cabi cabs cac- caca cacc caci caia caib caic cais cait caix casa casb casc casi cass cast cat- cata catb catc cati cats catt caxa cbac cbat cbax cbbc cbbs cbca cbcc cbcs cbct cbia cbit cbsa cbsc cbsi cbta cbtc cbxa ccaa ccab ccac ccai ccas ccat ccba ccbc ccca cccb cccc ccci cccs ccic ccii ccis ccix ccsa ccsi ccss ccst cctb cctc cctt ccxi ciaa cias ciat ciba cibc cibi cica cicc cici cics cict ciia ciii ciis ciit cis- cisa cisc ciss cist cita citb citi cits citt cixi csaa csab csac csas csat cscb cscc csci cscs csia csib csis csit csix cssa csta cstc csts cstx csxt ctab ctba ctbi ctbs ctca ctia ctic ctsa ctsc ctss ctta ctts cxii cxix cxxi cxxx iaaa iaac iaai iaas iaat iaba iaca iacc iacs iact iaia iais iasa iasc iasi iata iatc iati ibac ibas ibat ibca ibcs ibia ibis ibsa ibss ibtb ibtc ibts icaa icab icac icai icas icat icbc icbs icca iccb iccc icci iccs icct icis icsa icsb icsc icsi icss icst icta icts iiac iias iica iiii iiis iiit iisc iisi iist iita iitt is-a isac isai isas isat isba isbt isbx isca iscc isci iscs isct isia isic isis isit issa issc issi isss ista istc isti ists itaa itac itai itas itat itbs itcs itia itic itis itsa itsi itta ixia ixxi s-ib s-ic s-ii sa-c sa-x saab saac saas saat saba sabb sabc sabi sabs saca sacc saci sacs sact saia saic sais sait saix sasa sasc sasi sass sast sata satb satc sati sats satt saxa saxi saxt sbaa sbac sbai sbas sbbs sbca sbcc sbcs sbct sbia sbic sbsa sbsi sbst sbtc scaa scab scac scai scas scat scba scbi sccc sccs scct sci- scia scic scis scit scsa scsc scsi scst sctc scts siaa siab siac siai sias siat siba sibc sibi sibs sica sicc sici sics siit sisa sisc sisi siss sist sit- sita sitc siti sits sitt sixa sixt sixx ssaa ssab ssac ssas ssat ssca sscc ssci sscs ssis ssit sssa sssb sssc sssi ssss ssta sstb sstc ssts stab stac stai stas stat stax stbc stbs stca stcc stcs stia stib stic stis stit stix stsi stss sttc taa- taas taat taba tabb tabc tabi tabs taca tacc taci tacs tact taia tais tait taix tasa tasb tasc tasi tass tast tata tatb tati tats tatt tax- taxa taxi taxt tbas tbbs tbca tbcb tbcc tbit tbst tbta tcbs tcca tccc tctc tcts tiaa tiab tias tiax tiba tibi tibs tica ticc tics tiit tisa tisb tisi tiss tist tita titc titi tits titt tixt tsaa tsai tsat tsbc tsca tscc tsia tsis tsix tssa tssi tsst tstc tsts ttab ttbb ttss tttt txaa txii xact xait xats xbai xcas xcat xcii xcis xica xics xiii xisi xist xita xixi xtbs xxii xxix xxxi xxxx