a-a a-b a-c aaa aab aac aad aak aan aas ab- aba abb abc abd abk abn abs ac- aca acb acc acd ack acn acs ad- ada adb adc add adk adn ads aka akb akc akd akk akn aks an- ana anb anc and ank ann ans as- asa asb asc asd ask asn ass baa bab bac bad bak ban bas bba bbb bbc bbd bbk bbn bbs bca bcb bcc bcd bck bcn bcs bda bdb bdc bdd bdk bds bka bkb bkc bkk bkn bks bna bnb bnc bnd bnk bnn bns bsa bsb bsc bsd bsk bsn bss c-- caa cab cac cad cak can cas cba cbb cbc cbd cbk cbn cbs cca ccb ccc ccd cck ccn ccs cda cdb cdc cdd cdk cdn cds cka ckb ckc ckd cks cn- cna cnb cnc cnd cnn cns csa csb csc csd csk csn css daa dab dac dad dak dan das dba dbb dbc dbd dbk dbn dbs dca dcb dcc dcd dck dcn dcs dda ddb ddc ddd ddk ddn dds dka dkb dkc dkk dks dna dnb dnc dnd dnk dnn dns dsa dsb dsc dsd dsk dsn dss ka- kaa kab kac kad kak kan kas kba kbb kbc kbd kbk kbn kbs kca kcb kcc kcd kck kcn kcs kda kdb kdc kdk kds kkb kkc kkk kkn kks kn- kna knc knd knk knn ksa ksb ksc ksd ksk ksn kss naa nab nac nad nak nan nas nba nbb nbc nbd nbk nbn nbs nca ncb ncc ncd nck ncn ncs nda ndb ndc ndd ndk ndn nds nka nkc nkk nkn nks nna nnb nnc nnk nnn nns nsa nsb nsc nsd nsk nsn nss saa sab sac sad sak san sas sba sbb sbc sbd sbk sbn sbs sca scb scc scd sck scn scs sda sdb sdc sdd sdk sdn sds sk- ska skb skc skd skk sks sna snb snc snd snk snn sns ss- ssa ssb ssc ssd ssk ssn sss

-ana a-ak aaaa aaab aaac aaad aaan aaas aaba aabb aabc aabd aaca aacb aacc aacd aack aacn aacs aada aadc aads aaka aana aand aasa aasc aasd aass abaa abab abac abad abak aban abas abb- abba abbb abbs abca abcb abcc abcd abcn abcs abda abs- absa absd abss acaa acab acac acad acan acas acba acca accc accd accs acda acdb acdc acds ackd acks acsa acsc acsd acss adaa adab adac adad adak adan adas adba adbc adcc adcs adda addc addd addn adds adna adns adsa adss akaa akan akas akca akdn akka akna aksa ana- anaa anab anac anad anak anan anas anba anbb anca ancc and- anda ands ank- anka anna annb anns ansa ansd asaa asab asac asad asak asan asas asba asc- asca ascb ascc asda asds aska asks asnc assa assc assd assk assn asss baaa baad baak baan baas baba babb babs bac- baca bacc back bacn bacs bada badb badd bads bak- baka baks bana banc band bank bann bans basa basc bask bass bbad bbas bbbb bbbs bbdd bcaa bcas bcbc bcbs bcca bccc bccs bcda bcds bcsa bcsc bcsn bcss bdbc bddc bdna bdsd bnas bnss bsaa bsac bsas bsbd bscs bsnd bsns bssc bssd c-cd caaa caab caac caan caas caba cabs cac- caca cacc cack cada cadc cadd cads caka cana canc cand cank cann cans casa casb casc casd cask cass cbac cbbc cbbs cbca cbcc cbcn cbcs cbdb cbdc cbdn cbds cbka cbkn cbna cbnd cbsa cbsc cbsn ccaa ccab ccac ccad ccas ccba ccbc ccbn ccca cccb cccc cccs ccdc ccdn ccds ccna ccnb ccnc ccns ccsa ccsd ccsn ccss cdaa cdac cdad cdba cdcs cdda cddb cdna cdnb cdnc cdss ckac ckan ckbc ckck ckcs cknb cknc ckns cksa cksb cnaa cnac cnas cnbc cnda cndd cnna cnsa cnss csaa csab csac csak csas cscb cscc cscd cscs csda csdb csdn cska csks cssa cssd d-na daab daad daan daas daba dabb dabs daca dacs dada dads daka daks dana dand dank dann dans dasa dasb dasc dasd dask dass dbas dbcc dbcs dbsa dbss dcas dcbc dcca dccb dccc dccs dcdb dcds dcns dcsc dcss dddd ddss dkba dkdc dnaa dnab dnac dnad dnan dnas dncs dnsa dnsc dsac dsba dsbc dscc dscn dscs dsda dssa dssc dssn kaaa kaab kaak kaan kaas kaba kabb kabc kabd kacb kacc kacd kacs kad- kada kadd kads kaka kakc kakk kakn kaks kana kanb kand kann kans kas- kasa kasb kasc kask kasn kass kbaa kbab kbac kbad kbak kbas kbba kbbb kbbc kbbd kbbk kbbs kbca kbcb kbck kbcs kbdb kbdn kbds kbkb kbkk kbna kbnd kbnn kbsa kbsb kbsk kbsn kbss kcaa kcab kcac kcad kcas kcba kcbc kcbd kcbk kcbs kcca kccb kccc kccd kcck kcda kcdc kcdd kcds kckc kckk kckn kcnb kcnd kcns kcsa kcsb kcsc kcsd kcsn kcss kdaa kdab kdac kdad kdak kdbb kdbn kdbs kdca kdcc kdcd kddb kddc kddd kddk kdka kdkb kdkd kdkk kdkn kdna kdnd kdnk kdnn kdns kdsc kdsd kdsk kdsn kdss kkaa kkac kkan kkba kkbb kkbd kkbn kkbs kkcb kkcd kkck kkcn kkcs kkda kkdc kkdd kkkk kknb kknd kknn kkns kksa kksd kksn kkss knaa knab knac knan knas knba knbb knbc knbn knca kncb knck kncn knda kndb kndc kndd kndk kndn knkk knnb knnd knnk knns knsa knsb knsc knsd knsk knsn knss ksab ksac ksak ksan ksas ksba ksbc ksbn ksbs ksca kscb ksck kscn kscs ksdc ksdk ksdn ksds kska kskb kskd kskk kskn ksks ksna ksnb ksnc ksnd ksnk ksnn ksns kssa kssn ksss naaa naab naac naad naan naas naba nabc nabk nabs naca nacc nacd nack nacs nada nadc nadk nads naka naks nan- nana nanb nand nann nans nas- nasa nasb nasc nasd nask nass nbaa nbad nbak nbas nbbc nbca nbcc nbcs ncaa ncac ncba ncbc ncbs ncca nccc nccn nccs ncda ncdc ncdn ncds ncna ncnc