-al a-a a-b a-c aaa aab aac aal aan aas aau ab- aba abb abc abl abn abs abu ac- aca acb acc acl acn acs acu al- ala alb alc all aln als alu an- ana anb anc anl ann ans anu as- asa asb asc asl asn ass asu au- aua aub auc aul aun aus b-u baa bab bac bal ban bas bau bba bbb bbc bbl bbn bbs bbu bca bcb bcc bcl bcn bcs bcu bla blb blc bll bln bls blu bna bnb bnc bnl bnn bns bnu bsa bsb bsc bsl bsn bss bsu bua bub buc bul bun bus buu c-- caa cab cac cal can cas cau cba cbb cbc cbl cbn cbs cbu cca ccb ccc ccl ccn ccs ccu cl- cla clb clc cll cln cls clu cn- cna cnb cnc cnl cnn cns cnu csa csb csc csl csn css csu cua cub cuc cul cun cus cuu la- laa lab lac lal lan las lau lba lbb lbc lbl lbs lbu lca lcb lcc lcl lcn lcs lcu lla llb llc lll lln lls llu lna lnb lnc lnl lnn lns lnu lsa lsb lsc lsl lsn lss lsu lua lub luc lul lun lus luu naa nab nac nal nan nas nau nba nbb nbc nbl nbn nbs nbu nca ncb ncc ncl ncn ncs ncu nla nlb nlc nll nln nls nlu nna nnb nnc nnl nnn nns nnu nsa nsb nsc nsl nsn nss nsu nua nub nuc nul nun nus nuu saa sab sac sal san sas sau sba sbb sbc sbl sbn sbs sbu sca scb scc scl scn scs scu sla slb slc sll sln sls slu sna snb snc snl snn sns snu ss- ssa ssb ssc ssl ssn sss ssu sua sub suc sul sun sus suu ua- uaa uab uac ual uan uas uau uba ubb ubc ubl ubn ubs ubu uca ucb ucc ucl ucn ucs ucu ula ulb ulc ull uln uls ulu un- una unb unc unl unn uns unu usa usb usc usl usn uss usu uua uuc uun uus uuu

-ana a-un aaaa aaab aaac aaal aaan aaas aaba aabb aabc aabl aaca aacb aacc aacl aacn aacs aacu aala aalc aall aals aalu aana aasa aasc aass aasu aaus abaa abab abac abal aban abas abau abb- abba abbb abbs abca abcb abcc abcl abcn abcs abla abls abnu abs- absa absl abss absu abua abul abun abus acaa acab acac acan acas acba acbl acca accc accs accu acla aclc acls aclu acsa acsc acsl acss acu- acul acus alaa alac alal alan alas alau alb- alba albc albs albu alca alcc alcs all- alla alll alln alls allu alna alsa alsc alsn alua alun alus ana- anaa anab anac anal anan anas anau anba anbb anbl anbu anca ancc anla anlc anln anlu anna annb anns ansa ansu anua anub anul anun anus asaa asab asac asal asan asas asau asba asbu asc- asca ascb ascc ascl asla asnc asnl assa assc assl assn asss assu asub asun asus auaa auca aul- aula aull auln auls aulu auna ausa ausu baaa baal baan baas baba babb babs babu bac- baca bacc bacn bacs bala balc ball bals balu bana banc bann bans banu basa basc bass basu bau- baul bbas bbau bbbb bbbs bblb bbls bcaa bcas bcbc bcbs bcca bccc bccl bccs bcnu bcsa bcsc bcsl bcsn bcss bcuc blaa blab blac blan blas blau blcu blls blss blub blus bnas bnss bsaa bsac bsas bscs bslc bsns bssc bual buba bubb bubs bubu buca bucc bucs bucu bula bulb bull buls bulu buna bunb bunn buns bunu busa busc buss busu buus caaa caab caac caal caan caas caba cabs cabu cac- caca cacc cala calc call cals calu cana canc cann cans casa casb casc casl cass casu cauc caul caus cbac cbal cbbc cbbs cbca cbcc cbcl cbcn cbcs cbcu cblb cblc cbln cbna cbsa cbsc cbsn cbus ccaa ccab ccac ccas ccba ccbc ccbn ccca cccb cccc cccl cccs cccu ccla cclc ccls ccna ccnb ccnc ccns ccnu ccsa ccsl ccsn ccss ccuc ccus clab clan clas clau clsa clsc club clun cnaa cnac cnas cnbc cnbl cnna cnsa cnsl cnss csaa csab csac csas cscb cscc cscl cscs csla cslu cssa csua csus cuan cuau cub- cuba cubb cubs cuca cucc cucn cula culb culc cull culs cuna cusa cusb cuss cusu laaa laac laal laan laas laba labs labu laca lacc lacl lacs lacu lala lall lalu lan- lana lanc lann lans lanu lasa lass lasu laub laul laun laus lbcc lbsc lcac lcbc lcca lccc lccs lcls lcsc llan llbs llcc llcs lllc llll lsbu lscb lscs lsla lssa luan luas luau luba lubs luca lucs lula lull lulu luna lunn luns lusa luss luua naaa naab naac naal naan naas naba nabc nabl nabs nabu naca nacc nacl nacs nala nalc nall nals nalu nan- nana nanb nann nans nanu nas- nasa nasb nasc nasl nass nasu naul naus nbaa nbas nbbc nbca nbcc nbcs ncaa ncac ncba ncbc ncbs ncca nccc nccn nccs nccu nclc ncln ncna ncnc ncsa ncsc ncsl ncss ncua nlab nlcc nlcs nlls nlsc nnls nnnn nnsa nnsl nnss nsaa nsac nsca nscc nscl nscs nsla nsls nsna nssa nssb nssc nsss nsub nuan nuba nubc nubl nubs nuca nucs nucu null nuna nunc nunn nuns nusl nuss nusu sa-c saab saac saal saan saas saba sabb sabc sabs sabu saca sacc sacn sacs sacu sala salc sall sals salu sana sann sans sanu sasa sasc sasl sass saua sauc saul saun saus sbaa sbac sbas sbbs sbca sbcc sbcs sbsa sbus scaa scab scac scal scan scas scba sccc sccl sccs scl- sclc scls scna scsa scsc scsl scsn scsu scua scub scul scun slaa slab slac slan slas slau slcc slcu slln slsa slsc slsu slub sluc snab snas snba snca sncc snla snns