-ic a-a a-b a-c a-i aaa aab aac aai aak aar aas ab- aba abb abc abi abk abr abs ac- aca acb acc aci ack acr acs ai- aia aib aic aii aik air ais aka akb akc aki akk akr aks ar- ara arb arc ari ark arr ars as- asa asb asc asi ask asr ass baa bab bac bai bak bar bas bba bbb bbc bbi bbk bbr bbs bca bcb bcc bci bck bcr bcs bi- bia bib bic bii bik bir bis bka bkb bkc bkk bkr bks bra brb bri brk brr brs bsa bsb bsc bsi bsk bsr bss c-- caa cab cac cai cak car cas cba cbb cbc cbi cbk cbr cbs cca ccb ccc cci cck ccr ccs ci- cia cib cic cii cik cir cis cka ckb ckc cki cks cra crb crc cri crk crr crs csa csb csc csi csk csr css ia- iaa iab iac iai iar ias iba ibb ibc ibi ibk ibr ibs ica icb icc ici ick icr ics iia iib iic iii iir iis ika ikb ikc iki ikk ikr iks ir- ira irb irc iri irk irr irs is- isa isb isc isi isk isr iss ka- kaa kab kac kai kak kar kas kba kbb kbc kbi kbk kbr kbs kca kcb kcc kci kck kcr kcs kia kib kic kii kik kir kis kkb kkc kki kkk kkr kks kra krc kri krk krr krs ksa ksb ksc ksi ksk ksr kss ra- raa rab rac rai rak rar ras rba rbb rbc rbi rbk rbr rbs rca rcb rcc rci rcr rcs ria rib ric rii rik rir ris rkb rkc rkk rks rra rrb rrc rri rrk rrr rrs rsa rsb rsc rsi rsk rsr rss saa sab sac sai sak sar sas sba sbb sbc sbi sbk sbr sbs sca scb scc sci sck scr scs sia sib sic sii sik sir sis sk- ska skb skc ski skk skr sks sr- sra srb src sri srk srr srs ss- ssa ssb ssc ssi ssk ssr sss

a-ak a-ii aaaa aaab aaac aaai aaar aaas aaba aabb aabc aabi aaca aacb aacc aaci aack aacr aacs aaib aaic aaii aais aaka aara aarc aari aars aasa aasc aasi aass abaa abab abac abai abak abar abas abb- abba abbb abbi abbr abbs abca abcb abcc abci abcr abcs abia abib abic abir abis abra abrc abri abrs abs- absa absi abss acaa acab acac acai acar acas acba acca accc acci accs aci- acia acic acir acis acks acr- acra acrc acri acrr acrs acsa acsc acsi acss aiai aias aiba aica aicc aicr aics aiia aiib aiic aiir aika aiki aiks aira airi airs aisa aisb aisi aisk aisr akaa akai akar akas akca akia akik akir akis akka akki akr- akra aksa aksi arab arac arai arak arar aras arba arbi arbs arc- arca arci arcs aria arib arii arik aris arka arki arks arr- arra arrc arri arrk arrr arrs ars- arsa arsc arsi arsk asaa asab asac asai asak asar asas asba asc- asca ascb ascc asci ascr asia asic asii asik asir asis aska aski askr asks asra asrc asrs assa assc assi assk assr asss ba-i baaa baak baar baas baba babb babi babr babs bac- baca bacc baci back bacs baia baib baic baik bair bais bak- baka baki bakr baks bar- bara barb barc bari bark barr bars basa basc basi bask bass bbas bbbb bbbs bbci bbrc bcaa bcar bcas bcbc bcbs bcca bccc bcci bccs bcia bcis bcra bcrs bcsa bcsc bcss biak biar bias biba bibb bibi bibs bica bicc bici bick bics biis bira birb biri birk birr birs bis- bisa bisc bisk biss brab brac brai brak bras brca brcb bria bric brik bris brka brkb brrr brrs brsb brsr bsaa bsac bsas bsci bscs bsic bsra bssc caaa caab caac caas caba cabi cabs cac- caca cacc caci cack cacr caia caib caic caik cair cais caka cara carb carc cari cark carr cars casa casb casc casi cask casr cass cbac cbar cbbc cbbs cbca cbcc cbcr cbcs cbia cbir cbka cbkr cbsa cbsc cbsi ccaa ccab ccac ccai ccar ccas ccba ccbc ccca cccb cccc ccci cccs ccic ccii ccir ccis ccra ccrc ccri ccrs ccsa ccsi ccss ciaa ciak ciar cias ciba cibc cibi cica cicc cici cicr cics ciia ciii ciis cika cikr cira cirb circ ciri cirk cirr cirs cis- cisa cisc cisk cisr ciss ckac ckbc ckbi ckck ckcs ckrc cksa cksb crab crac crai crar cras crbc crca crcc crcr cria crib cric crik cris crkc crsa crss csaa csab csac csak csar csas cscb cscc csci cscr cscs csia csib csik csir csis cska csks csra csrc csrs cssa cssr iaaa iaac iaai iaas iaba iaca iacc iacr iacs iaia iais iara iarc iars iasa iasc iasi iask iasr ibac ibar ibas ibca ibcs ibia ibis ibra ibrc ibri ibsa ibss icaa icab icac icai icar icas icbc icbs icca iccb iccc icci iccr iccs icis icks icra icrc icrr icrs icsa icsb icsc icsi icsr icss iiac iias iica iiii iiis iira iirc iirs iisc iisi iisr ikar ikki ikra ikri irac irai irak irar iras irca ircc ircs iri- iria iric iris irka irki irks irra irrc irri irrs irsa is-a isac isai isak isar isas isba isca iscc isci iscr iscs isia isic isis iska isra isri issa issc issi issr isss k-ci kaaa kaab kaai kaak kaar kaas kaba kabb kabc kabi kabr kacb kacc kaci kacs kaia kaib kaic kaii kaik kair kais kaka kakc kaki kakk kaks kara karb kari kark karr kars kas- kasa kasb kasc kasi kask kasr kass kbaa kbab kbac kbai kbak kbar kbas kbba kbbb kbbc kbbi kbbk kbbr kbbs kbca kbcb kbci kbck kbcr kbcs kbia kbib kbic kbik kbis kbkb kbkk kbkr kbra kbrb kbrc kbri kbrk kbsa kbsb kbsi