a-a a-b a-c aaa aab aac aam aan aar aas aau ab- aba abb abc abm abn abr abs abu ac- aca acb acc acm acn acr acs acu ama amb amc amm amn amr ams amu an- ana anb anc anm ann anr ans anu ar- ara arb arc arm arn arr ars aru as- asa asb asc asm asn asr ass asu au- aua aub auc aum aun aur aus b-u baa bab bac bam ban bar bas bau bba bbb bbc bbm bbn bbr bbs bbu bca bcb bcc bcm bcn bcr bcs bcu bma bmb bmc bmm bmn bmr bms bmu bna bnb bnc bnn bnr bns bnu bra brb brm brn brr brs bru bsa bsb bsc bsm bsn bsr bss bsu bua bub buc bum bun bur bus buu c-- caa cab cac cam can car cas cau cba cbb cbc cbm cbn cbr cbs cbu cca ccb ccc ccm ccn ccr ccs ccu cma cmb cmc cmm cmn cmr cms cmu cn- cna cnb cnc cnm cnn cnr cns cnu cra crb crc crm crn crr crs cru csa csb csc csm csn csr css csu cua cub cuc cum cun cur cus cuu m-r maa mab mac mam man mar mas mau mba mbb mbc mbm mbr mbs mbu mc- mca mcb mcc mcm mcn mcr mcs mcu mma mmb mmc mmm mmn mmr mms mmu mna mnb mnc mnm mnn mnr mns mnu mra mrb mrc mrm mrn mrr mrs mru msa msb msc msm msn msr mss msu mua mub muc mum mun mur mus muu naa nab nac nam nan nar nas nau nba nbb nbc nbm nbn nbr nbs nbu nca ncb ncc ncm ncn ncr ncs ncu nma nmb nmc nmm nmn nmr nms nmu nna nnb nnc nnm nnn nns nnu nra nrb nrc nrm nrn nrr nrs nru nsa nsb nsc nsm nsn nsr nss nsu nua nub nuc num nun nur nus nuu ra- raa rab rac ram ran rar ras rau rba rbb rbc rbm rbn rbr rbs rbu rca rcb rcc rcm rcn rcr rcs rcu rma rmb rmc rmm rmn rmr rms rna rnb rnc rnm rnn rnr rns rnu rra rrb rrc rrm rrn rrr rrs rru rsa rsb rsc rsm rsn rsr rss rsu rua rub ruc rum run rur rus ruu saa sab sac sam san sar sas sau sba sbb sbc sbm sbn sbr sbs sbu sca scb scc scm scn scr scs scu sma smb smc smm smn smr sms smu sna snb snc snm snn snr sns snu sr- sra srb src srm srn srr srs ss- ssa ssb ssc ssm ssn ssr sss ssu sua sub suc sum sun sur sus suu ua- uaa uab uac uam uan uar uas uau uba ubb ubc ubn ubr ubs ubu uca ucb ucc ucm ucn ucr ucs ucu um- uma umb umc umm umn umr ums umu un- una unb unc unm unn unr uns unu ur- ura urb urc urm urn urr urs uru usa usb usc usm usn usr uss usu uua uuc uum uun uur uus uuu

-ana a-un aaaa aaab aaac aaam aaan aaar aaas aaba aabb aabc aabm aaca aacb aacc aacm aacn aacr aacs aacu aama aamb aamc aamn aamr aams aana aara aarc aarm aars aaru aasa aasc aasm aass aasu aaus abaa abab abac abam aban abar abas abau abb- abba abbb abbr abbs abca abcb abcc abcn abcr abcs abma abmb abmc abms abnu abra abrc abrs abs- absa abss absu abua abum abun abus acaa acab acac acan acar acas acba acca accc accm accs accu acma acmc acms acmu acr- acra acrc acrm acrr acrs acsa acsc acsm acss acu- acum acur acus amaa amac amam aman amar amas amb- amba ambn ambr ambs ambu amca amcc amcs amm- amma ammu amns amra amrc amsa amsc amsn amss amua amum amun amur ana- anaa anab anac anam anan anar anas anau anba anbb anbu anca ancc anma anmu anna annb anns anrc ansa ansu anua anub anum anun anus arab arac aram aran arar aras arau arba arbs arc- arca arcm arcs arma armc armm arms armu arna arns arr- arra arrc arrr arrs arru ars- arsa arsc arsu arua arub arum arun asaa asab asac asam asan asar asas asau asba asbm asbu asc- asca ascb ascc ascr asma asmm asmr asms asnc asra asrc asrm asrs asru assa assc assn assr asss assu asub asum asun asur asus auaa auca auma auna aur- aura ausa ausm ausu baaa baam baan baar baas baba babb babm babr babs babu bac- baca bacc bacn bacs bama bamb bamc bamm bamn bams bamu bana banc bann banr bans banu bar- bara barb barc barm barn barr bars baru basa basc bass basu bau- baum baur bbas bbau bbbb bbbs bbcm bbrc bcaa bcam bcar bcas bcbc bcbs bcca bccc bccm bccs bcma bcms bcnu bcra bcrs bcru bcsa bcsc bcsm bcsn bcss bcuc bmaa bman bmus bnas bnrr bnss brab brac bram bran bras brau brca brcb brmc brna brns brrm brrr brrs brsb brsr bruc brum brun brus bsaa bsac bsam bsas bscs bsms bsns bsra bsrm bssc bssm buar buba bubb bubs bubu buca bucc bucs bucu bum- buma bumb bums buna bunb bunn buns bunu bur- bura burb burm burn burr burs buru busa busc buss busu buus caaa caab caac caam caan caas caba cabs cabu cac- caca cacc cacm cacr cama camb camc camm cams cana canc cann cans cara carb carc carm carn carr cars casa casb casc casm casr cass casu cauc caum caus cbac cbar cbbc cbbs cbca cbcc cbcm cbcn cbcr cbcs cbcu cbms cbna cbrm cbrn cbsa cbsc cbsm cbsn cbus ccaa ccab ccac ccam ccar ccas ccba ccbc ccbn ccca cccb cccc cccm cccs cccu ccma ccmb ccmc ccmm ccms ccna ccnb ccnc ccnm ccnr ccns ccnu ccra ccrc ccrs ccsa ccsn ccss ccuc ccus