-ic a-a a-b a-c a-i a-t aaa aab aac aai aak aas aat ab- aba abb abc abi abk abs abt ac- aca acb acc aci ack acs act ai- aia aib aic aii aik ais ait aka akb akc aki akk aks as- asa asb asc asi ask ass ast at- ata atb atc ati ats att baa bab bac bai bak bas bat bba bbb bbc bbi bbk bbs bbt bca bcb bcc bci bck bcs bct bi- bia bib bic bii bik bis bit bka bkb bkc bkk bks bkt bsa bsb bsc bsi bsk bss bst bta btb btc bti btk bts btt c-- caa cab cac cai cak cas cat cba cbb cbc cbi cbk cbs cbt cca ccb ccc cci cck ccs cct ci- cia cib cic cii cik cis cit cka ckb ckc cki cks ckt csa csb csc csi csk css cst cta ctb ctc cti ctk cts ctt ia- iaa iab iac iai ias iat iba ibb ibc ibi ibk ibs ibt ica icb icc ici ick ics ict iia iib iic iii iis iit ika ikb ikc iki ikk iks ikt is- isa isb isc isi isk iss ist ita itb itc iti itk its itt k-t ka- kaa kab kac kai kak kas kat kba kbb kbc kbi kbk kbs kca kcb kcc kci kck kcs kct kia kib kic kii kik kis kit kkb kkc kki kkk kks kkt ksa ksb ksc ksi ksk kss kst kta ktb ktc ktk kts ktt saa sab sac sai sak sas sat sba sbb sbc sbi sbk sbs sbt sca scb scc sci sck scs sct sia sib sic sii sik sis sit sk- ska skb skc ski skk sks skt ss- ssa ssb ssc ssi ssk sss sst sta stb stc sti stk sts stt taa tab tac tai tak tas tat tba tbb tbc tbi tbk tbs tbt tca tcb tcc tci tck tcs tct tia tib tic tii tik tis tit tka tkb tkc tkk tks tkt tsa tsb tsc tsi tsk tss tst tta ttb ttc tti ttk tts ttt

a-ak a-ii aaaa aaab aaac aaai aaas aaba aabb aabc aabi aabt aaca aacb aacc aaci aack aacs aact aaib aaic aaii aais aaka aasa aasc aasi aass aast aata aatc aatk aatt abaa abab abac abai abak abas abat 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 acks acsa acsc acsi acss acst acta actc acti acts actt aiai aias aiba aica aicc aics aiia aiib aiic aika aiki aiks aisa aisb aisi aisk aist aita aiti aits aitt akaa akai akas akca akia akik akis akka akki aksa aksi akst asaa asab asac asai asak asas asat asba asc- asca ascb ascc asci asct asia asic asii asik asis asit aska aski asks askt assa assc assi assk asss asst asta astb astc asti asts at-t ataa atab atac atai atak atas atat atbs atca atcc atck atcs atia atic atik atis atit atka atkt atsb atsc atsi atst atta atti atts ba-i baaa baak baas baat baba babb babi babs bac- baca bacc baci back bacs bact baia baib baic baik bais bait bak- baka baki baks bakt basa basc basi bask bass bast bata batc bati bats batt bbas bbbb bbbs bbci bcaa bcas bcat bcbc bcbs bcca bccc bcci bccs bcia bcis bcit bcsa bcsc bcss bctc bcts biak bias biat biba bibb bibi bibs bica bicc bici bick bics biis bis- bisa bisc bisk biss bist bita bitc bits bitt bsaa bsac bsas bsat bsci bscs bsic bskt bssc bsts btaa btcc btcs btss bttb caaa caab caac caas caat caba cabi cabs cac- caca cacc caci cack caia caib caic caik cais cait caka casa casb casc casi cask cass cast cat- cata catb catc cati cats catt cbac cbat cbbc cbbs cbca cbcc cbcs cbct cbia cbit cbka cbsa cbsc cbsi cbta cbtc ccaa ccab ccac ccai ccas ccat ccba ccbc ccca cccb cccc ccci cccs ccic ccii ccis ccsa ccsi ccss ccst cctb cctc cctt ciaa ciak cias ciat ciba cibc cibi cica cicc cici cics cict ciia ciii ciis ciit cika cis- cisa cisc cisk ciss cist cita citb citi cits citt ckac ckat ckbc ckbi ckck ckcs cksa cksb ckst cktb ckts csaa csab csac csak csas csat cscb cscc csci cscs csia csib csik csis csit cska csks cssa csta cstc csts ctab ctba ctbi ctbs ctca ctia ctic ctsa ctsc ctss ctta ctts iaaa iaac iaai iaas iaat iaba iaca iacc iacs iact iaia iais iasa iasc iasi iask 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 icks icsa icsb icsc icsi icss icst icta icts iiac iias iica iiii iiis iiit iisc iisi iist iita iitt ikat ikki is-a isac isai isak isas isat isba isbt isca iscc isci iscs isct isia isic isis isit iska issa issc issi isss ista istc isti ists itaa itac itai itak itas itat itbs itcs itia itic itis itsa itsi itta k-ci kaaa kaab kaai kaak kaas kaat kaba kabb kabc kabi kacb kacc kaci kacs kact kaia kaib kaic kaii kaik kais kait kaka kakc kaki kakk kaks kakt kas- kasa kasb kasc kasi kask kass kast kat- kata katb katc kati katk kats katt kbaa kbab kbac kbai kbak kbas kbat kbba kbbb kbbc kbbi kbbk kbbs kbbt kbca kbcb kbci kbck kbcs kbct kbia kbib kbic kbik kbis kbit kbkb kbkk kbsa kbsb kbsi kbsk kbss kbst kbta kbtb kbtc kbtk kbts kbtt kcaa kcab kcac kcai kcas kcat kcba kcbc kcbi kcbk kcbs kcca kccb kccc kcci kcck kcct kcic kcii kcis kcit kckc kckk kcsa kcsb kcsc