a-a a-b a-c aaa aab aac aad aan aar aas ab- aba abb abc abd abn abr abs ac- aca acb acc acd acn acr acs ad- ada adb adc add adn adr ads an- ana anb anc and ann anr ans ar- ara arb arc ard arn arr ars as- asa asb asc asd asn asr ass baa bab bac bad ban bar bas bba bbb bbc bbd bbn bbr bbs bca bcb bcc bcd bcn bcr bcs bda bdb bdc bdd bdr bds bna bnb bnc bnd bnn bnr bns bra brb brd brn brr brs bsa bsb bsc bsd bsn bsr bss c-- caa cab cac cad can car cas cba cbb cbc cbd cbn cbr cbs cca ccb ccc ccd ccn ccr ccs cda cdb cdc cdd cdn cdr cds cn- cna cnb cnc cnd cnn cnr cns cra crb crc crd crn crr crs csa csb csc csd csn csr css daa dab dac dad dan dar das dba dbb dbc dbd dbn dbr dbs dca dcb dcc dcd dcn dcr dcs dda ddb ddc ddd ddn ddr dds dna dnb dnc dnd dnn dnr dns dra drb drc drd drn drr drs dsa dsb dsc dsd dsn dsr dss naa nab nac nad nan nar nas nba nbb nbc nbd nbn nbr nbs nca ncb ncc ncd ncn ncr ncs nda ndb ndc ndd ndn ndr nds nna nnb nnc nnn nns nra nrb nrc nrd nrn nrr nrs nsa nsb nsc nsd nsn nsr nss ra- raa rab rac rad ran rar ras rba rbb rbc rbd rbn rbr rbs rca rcb rcc rcd rcn rcr rcs rda rdb rdc rdd rdn rdr rds rna rnb rnc rnd rnn rnr rns rra rrb rrc rrd rrn rrr rrs rsa rsb rsc rsd rsn rsr rss saa sab sac sad san sar sas sba sbb sbc sbd sbn sbr sbs sca scb scc scd scn scr scs sda sdb sdc sdd sdn sdr sds sna snb snc snd snn snr sns sr- sra srb src srd srn srr srs ss- ssa ssb ssc ssd ssn ssr sss

-ana aaaa aaab aaac aaad aaan aaar aaas aaba aabb aabc aabd aaca aacb aacc aacd aacn aacr aacs aada aadc aads aana aand aara aarc aard aars aasa aasc aasd aass abaa abab abac abad aban abar abas abb- abba abbb abbr abbs abca abcb abcc abcd abcn abcr abcs abda abra abrc abrs abs- absa absd abss acaa acab acac acad acan acar acas acba acca accc accd accs acda acdb acdc acds acr- acra acrc acrr acrs acsa acsc acsd acss adaa adab adac adad adan adar adas adba adbc adcc adcs adda addc addd addn addr adds adna adns adra adrs adsa adsr adss ana- anaa anab anac anad anan anar anas anba anbb anca ancc and- anda andr ands anna annb anns anrc ansa ansd arab arac arad aran arar aras arba arbs arc- arca arcs arda ardc ards arna arnd arns arr- arra arrc arrr arrs ars- arsa arsc arsd asaa asab asac asad asan asar asas asba asc- asca ascb ascc ascr asda asds asnc asra asrc asrs assa assc assd assn assr asss baaa baad baan baar baas baba babb babr babs bac- baca bacc bacn bacs bada badb badd badr bads bana banc band bann banr bans bar- bara barb barc bard barn barr bars basa basc bass bbad bbas bbbb bbbs bbdd bbrc bcaa bcar bcas bcbc bcbs bcca bccc bccs bcda bcds bcra bcrs bcsa bcsc bcsn bcss bd-r bdbc bddc bdna bdsd bnas bnrr bnss brab brac brad bran bras brca brcb brda brds brna brns brrr brrs brsb brsr bsaa bsac bsas bsbd bscs bsnd bsns bsra bsrd bssc bssd c-cd caaa caab caac caan caas caba cabs cac- caca cacc cacr cada cadc cadd cadr cads cana canc cand cann cans cara carb carc card carn carr cars casa casb casc casd casr cass cbac cbar cbbc cbbs cbca cbcc cbcn cbcr cbcs cbdb cbdc cbdn cbds cbna cbnd cbrd cbrn cbsa cbsc cbsn ccaa ccab ccac ccad ccar ccas ccba ccbc ccbn ccca cccb cccc cccs ccdc ccdn ccdr ccds ccna ccnb ccnc ccnr ccns ccra ccrc ccrs ccsa ccsd ccsn ccss cd-r cdaa cdac cdad cdba cdcs cdda cddb cddr cdna cdnb cdnc cdrs cdss cnaa cnac cnas cnbc cnda cndd cnna cnrc cnrr cnsa cnss crab crac cran crar cras crbc crca crcc crcr crda crdc crna crns crsa crss csaa csab csac csar csas cscb cscc cscd cscr cscs csda csdb csdn csdr csra csrc csrd csrs cssa cssd cssr d-na daab daad daan daar daas daba dabb dabs daca dacs dada dads dana dand dann danr dans dara darb darc dard darn darr dars dasa dasb dasc dasd dass dbar dbas dbcc dbcs dbrn dbrs dbsa dbss dcas dcbc dcca dccb dccc dccs dcdb dcds dcns dcra dcsc dcss dddd ddrc ddss dnaa dnab dnac dnad dnan dnas dncs dnrc dnsa dnsc draa drab drac drad drar dras drba drbc drca drda drna drra drrs drsa dsac dsba dsbc dscc dscn dscr dscs dsda dsdr dsrc dsrr dssa dssc dssn naaa naab naac naad naan naar naas naba nabc nabs naca nacc nacd nacs nada nadc nadr nads nan- nana nanb nand nann nans nara narc nard narn narr nars nas- nasa nasb nasc nasd nasr nass nbaa nbad nbar nbas nbbc nbca nbcc nbcs ncaa ncac ncar ncba ncbc ncbs ncca nccc nccn nccr nccs ncda ncdc ncdn ncdr ncds ncna ncnc ncnd ncra ncrc ncsa ncsc ncss ndaa ndas ndcc ndcs nddb ndna ndrc ndss nndb nnnn nnsa nnss nrab nras nrca nrcs nrdc nrds nrna nrrc nrrd nrsa nrsc nsaa nsac nsar nsca nscc nscd nscs nsds nsna nsnr nsra nsrc nsrd nssa nssb nssc nssr nsss raab raad raan raas raba rabb rabs rac- raca racc racs rada radc radd radr rads rana ranc rand rann rans rara rarb rars rasa rasc rasd rass