-al a-a a-b a-c aaa aab aac aal aan aar aas ab- aba abb abc abl abn abr abs ac- aca acb acc acl acn acr acs al- ala alb alc all aln alr als an- ana anb anc anl ann anr ans ar- ara arb arc arl arn arr ars as- asa asb asc asl asn asr ass baa bab bac bal ban bar bas bba bbb bbc bbl bbn bbr bbs bca bcb bcc bcl bcn bcr bcs bla blb blc bll bln blr bls bna bnb bnc bnl bnn bnr bns bra brb brl brn brr brs bsa bsb bsc bsl bsn bsr bss c-- caa cab cac cal can car cas cba cbb cbc cbl cbn cbr cbs cca ccb ccc ccl ccn ccr ccs cl- cla clb clc cll cln clr cls cn- cna cnb cnc cnl cnn cnr cns cra crb crc crl crn crr crs csa csb csc csl csn csr css la- laa lab lac lal lan lar las lba lbb lbc lbl lbr lbs lca lcb lcc lcl lcn lcr lcs lla llb llc lll lln llr lls lna lnb lnc lnl lnn lnr lns lra lrb lrc lrn lrr lrs lsa lsb lsc lsl lsn lsr lss naa nab nac nal nan nar nas nba nbb nbc nbl nbn nbr nbs nca ncb ncc ncl ncn ncr ncs nla nlb nlc nll nln nlr nls nna nnb nnc nnl nnn nns nra nrb nrc nrl nrn nrr nrs nsa nsb nsc nsl nsn nsr nss ra- raa rab rac ral ran rar ras rba rbb rbc rbl rbn rbr rbs rca rcb rcc rcl rcn rcr rcs rla rlc rll rln rlr rls rna rnb rnc rnn rnr rns rra rrb rrc rrl rrn rrr rrs rsa rsb rsc rsl rsn rsr rss saa sab sac sal san sar sas sba sbb sbc sbl sbn sbr sbs sca scb scc scl scn scr scs sla slb slc sll sln slr sls sna snb snc snl snn snr sns sr- sra srb src srl srn srr srs ss- ssa ssb ssc ssl ssn ssr sss

-ana aaaa aaab aaac aaal aaan aaar aaas aaba aabb aabc aabl aaca aacb aacc aacl aacn aacr aacs aala aalc aall aals aana aara aarc aars aasa aasc aass abaa abab abac abal aban abar abas abb- abba abbb abbr abbs abca abcb abcc abcl abcn abcr abcs abla abls abra abrc abrs abs- absa absl abss acaa acab acac acan acar acas acba acbl acca accc accs acla aclc aclr acls acr- acra acrc acrr acrs acsa acsc acsl acss alaa alac alal alan alar alas alb- alba albc albs alca alcc alcs all- alla alll alln allr alls alna alsa alsc alsn ana- anaa anab anac anal anan anar anas anba anbb anbl anca ancc anla anlc anln anna annb anns anrc ansa arab arac aral aran arar aras arba arbs arc- arca arcs arla arna arns arr- arra arrc arrr arrs ars- arsa arsc asaa asab asac asal asan asar asas asba asc- asca ascb ascc ascl ascr asla aslr asnc asnl asra asrc asrs assa assc assl assn assr asss baaa baal baan baar baas baba babb babr babs bac- baca bacc bacn bacs bala balc ball bals bana banc bann banr bans bar- bara barb barc barn barr bars basa basc bass bbas bbbb bbbs bblb bbls bbrc bcaa bcar bcas bcbc bcbs bcca bccc bccl bccs bcra bcrs bcsa bcsc bcsl bcsn bcss blaa blab blac blan blas blls blrc blss bnas bnrr bnss brab brac bran bras brca brcb brls brna brns brrr brrs brsb brsr bsaa bsac bsas bscs bslc bsns bsra bssc caaa caab caac caal caan caas caba cabs cac- caca cacc cacr cala calc call cals cana canc cann cans cara carb carc carl carn carr cars casa casb casc casl casr cass cbac cbal cbar cbbc cbbs cbca cbcc cbcl cbcn cbcr cbcs cblb cblc cbln cbna cbrl cbrn cbsa cbsc cbsn ccaa ccab ccac ccar ccas ccba ccbc ccbn ccca cccb cccc cccl cccs ccla cclc ccls ccna ccnb ccnc ccnr ccns ccra ccrc ccrl ccrs ccsa ccsl ccsn ccss clab clan clar clas clra clrs clsa clsc cnaa cnac cnas cnbc cnbl cnna cnrc cnrr cnsa cnsl cnss crab crac cran crar cras crbc crca crcc crcr crls crna crns crsa crss csaa csab csac csar csas cscb cscc cscl cscr cscs csla cslr csra csrc csrs cssa cssr laaa laac laal laan laar laas laba labr labs laca lacc lacl lacs lala lall lan- lana lanc lann lans lara larb larc larn larr lars lasa lass lbar lbcc lblr lbrs lbsc lcac lcbc lcca lccc lccs lcls lcra lcrl lcrs lcsc lcsr llan llbs llcc llcs lllc llll lncr lrac lral lrba lrcs lrrc lrrr ls-r lscb lscs lsla lsrc lssa lssr naaa naab naac naal naan naar naas naba nabc nabl nabs naca nacc nacl nacs nala nalc nall nals nan- nana nanb nann nans nara narc narn narr nars nas- nasa nasb nasc nasl nasr nass nbaa nbar nbas nbbc nbca nbcc nbcs ncaa ncac ncar ncba ncbc ncbs ncca nccc nccn nccr nccs nclc ncln nclr ncna ncnc ncra ncrc ncsa ncsc ncsl ncss nlab nlcc nlcs nlls nlra nlrb nlsc nnls nnnn nnsa nnsl nnss nrab nras nrca nrcs nrlb nrna nrrc nrrl nrsa nrsc nsaa nsac nsar nsca nscc nscl nscs nsla nslr nsls nsna nsnr nsra nsrc nsrl nssa nssb nssc nssr nsss raab raan raas raba rabb rabl rabs rac- raca racc racs rala ralb rall rana ranc rann rans rara rarb rars rasa rasc rasl rass rbbb rbbr rbbs rbcl rbsl rbss rcac rcas rcbc rccb rccc rccs rcls rcnl rcnr rcsa rcsc rcsl rcss rlab rlcs rlls rnal rnas rnbr rncs rras rrna rrrr rsaa rscc rscn rscs rslc rsna rsnn rsnr rssa rssl sa-c saab saac saal saan saar saas saba sabb sabc sabr sabs saca sacc sacn sacr sacs