a-a a-b aaa aab aaf aag aan aao aar aas ab- aba abb abf abg abn abo abr abs af- afa afb aff afg afn afo afr afs ag- aga agb agf agg agn ago agr ags an- ana anb anf ang ann ano anr ans aoa aob aof aog aon aoo aor aos ar- ara arb arf arg arn aro arr ars as- asa asb asf asg asn aso asr ass baa bab baf bag ban bao bar bas bba bbb bbf bbg bbn bbo bbr bbs bfa bfb bff bfg bfn bfo bfr bfs bga bgb bgf bgg bgn bgo bgr bgs bna bnb bnf bng bnn bno bnr bns boa bob bof bog bon boo bor bos bra brb brf brg brn bro brr brs bsa bsb bsf bsg bsn bso bsr bss faa fab faf fag fan fao far fas fba fbb fbf fbg fbn fbo fbr fbs ffa fff ffg ffn ffo ffr ffs fga fgb fgf fgg fgn fgr fgs fna fnb fnf fng fnn fnr fns foa fob fof fog fon foo for fos fra frb frf frg frn fro frr frs fsa fsb fsf fsg fsn fso fsr fss gaa gab gaf gag gan gao gar gas gba gbf gbg gbn gbo gbr gbs gfa gfb gff gfo gfr gfs gga ggb ggg ggn ggo ggr ggs gna gnb gnf gnn gno gnr gns goa gob gof gog gon goo gor gos gra grb grf grg grn gro grr grs gsa gsb gsf gsg gsn gso gsr gss naa nab naf nag nan nao nar nas nba nbb nbf nbg nbn nbo nbr nbs nfa nfb nff nfn nfo nfr nfs nga ngb ngf ngg ngn ngo ngs nna nnb nnf nng nnn nno nns no- noa nob nof nog non noo nor nos nra nrb nrf nrg nrn nro nrr nrs nsa nsb nsf nsg nsn nso nsr nss oaa oab oaf oag oan oao oar oas ob- oba obb obf obg obn obo obr obs of- ofa ofb off ofg ofn ofo ofr ofs oga ogf ogg ogn ogo ogs on- ona onb onf ong onn ono onr ons oo- ooa oob oof oog oon ooo oor oos or- ora orb orf org orn oro orr ors os- osa osb osf osg osn oso osr oss ra- raa rab raf rag ran rao rar ras rba rbb rbf rbg rbn rbo rbr rbs rfa rfb rff rfg rfn rfo rfr rfs rga rgb rgf rgg rgn rgo rgr rgs rna rnb rng rnn rno rnr rns roa rob rof rog ron roo ror ros rra rrb rrf rrg rrn rrr rrs rsa rsb rsf rsg rsn rso rsr rss saa sab saf sag san sao sar sas sba sbb sbf sbg sbn sbo sbr sbs sfa sfb sff sfg sfn sfo sfr sfs sga sgb sgf sgg sgn sgo sgr sgs sna snb snf sng snn sno snr sns soa sob sof sog son soo sor sos sr- sra srb srf srg srn sro srr srs ss- ssa ssb ssf ssg ssn sso ssr sss

-ana aaaa aaab aaaf aaan aaar aaas aaba aabb aafa aafb aaff aana aang aaon aaoo aara aaro aars aasa aasf aass abaa abab abaf abag aban abar abas abb- abba abbb abbo abbr abbs abff aboa abob abof abon aboo abor abos abra abro abrs abs- absa absf abss afaa afan afao afar afbs affa affo affs afgf afoa afog afoo afor afr- afra afro afrs afsa afsb ag-o agag agan agao agar agas agba agbo agfa agga agna agno agns agob agog agon agoo agos agra agro agsa agsg ana- anaa anab anag anan anao anar anas anba anbb anbo anfa anfo ang- anga ango angs anna annb anno anns ano- anoa anon anor anos ansa ansf anso aoba aonb aono aora aorb aorn aors aoss arab araf arag aran arar aras arba arbs arfa arfb arff arfs arga argb argo args arna arng arno arns aroa arob aron aroo aror aros arr- arra arrg arro arrr arrs ars- arsa arso asaa asab asaf asag asan asao asar asas asba asbo asfa asno asob asof asog ason asor asos asra asrg asro asrs assa assn asso assr asss baaa baaf baan baar baas baba babb babo babr babs baff bafo baga bagg bagn bago bags bana bang bann bano banr bans baon baos bar- bara barb barf barg barn baro barr bars basa basf baso bass bbas bbbb bbbs bbfn bbga bbng bbrg bfas bffs bfgf bfsr bgan bggs bgon bnas bnor bnrr bnss boab boag boan boar boas boba bobb bobo bobs bofa boff bofs boga bogg bogo bogs bona bong bonn bono bons boob boof boog boon boor boos bor- bora borf borg born boro borr bors bosa bosn boso boss brab braf brag bran brao bras brna brno brns broa brob brog bron broo bror bros brrr brrs brsb brsr bsaa bsas bsfa bsff bsfs bsgs bsns bson bsos bsra faaa faan faas faba fabo fabs fafa faff fafg fafo fagg fago fags fana fang fano fans faon fara farb farg faro farr fars fasa fasn faso fass fbar fbrs ffar ffff ffrr ffsa ffss fnar fnrs foaf foan foar foba fobs fofo fogg fogn fogo fogs fong fono fons foof foon foos for- fora forb forg forn foro forr fors fosa fosb foso foss frab frag fran fras frns frob frog fron fros frsb frso fsas fsfo fsgs fsra fssa fssf gaar gaas gaba gabb gabo gabr gabs gafa gafb gaff gaga gagg gago gags gana gang gann gano gans gaon gaos gara garb garf garg garn garo garr gars gasa gasb gaso gasr gass gbag gban gbas gbbo gbbs gbon gffa gfoa gfor ggfg gggg ggrn ggss gnaa gnar gnas gnof gnoo gnrr goaf goan goar goas goba gobo gobs goff gofr goga gogo gogs gon- gona gong gonn gono gons goof goog goon goor goos gora gorb gorf gorg gorn goro gorr gors goso goss grab graf