a-a a-b aaa aab aad aaf aan aao aar aas aay ab- aba abb abd abf abn abo abr abs aby ad- ada adb add adf adn ado adr ads ady af- afa afb afd aff afn afo afr afs afy an- ana anb and anf ann ano anr ans any aoa aob aod aof aon aoo aor aos ar- ara arb ard arf arn aro arr ars ary as- asa asb asd asf asn aso asr ass asy ay- aya ayd ayf ayn ayo ayr ays baa bab bad baf ban bao bar bas bay bba bbb bbd bbf bbn bbo bbr bbs bby bda bdb bdd bdf bdo bdr bds bdy bfa bfb bfd bff bfn bfo bfr bfs bfy bna bnb bnd bnf bnn bno bnr bns boa bob bod bof bon boo bor bos boy bra brb brd brf brn bro brr brs bry bsa bsb bsd bsf bsn bso bsr bss bsy by- bya byd byf byn byo byr bys daa dab dad daf dan dao dar das day dba dbb dbd dbf dbn dbo dbr dbs dby dda ddb ddd ddf ddn ddo ddr dds ddy dfa dfb dfd dff dfn dfo dfr dfs dna dnb dnd dnf dnn dno dnr dns dny doa dob dod dof don doo dor dos doy dra drb drd drn dro drr drs dry dsa dsb dsd dsf dsn dso dsr dss dsy dy- dya dyb dyd dyn dyo dyr dys dyy faa fab fad faf fan fao far fas fay fba fbb fbd fbf fbn fbo fbr fbs fda fdb fdd fdf fdn fdo fdr fds ffa ffd fff ffn ffo ffr ffs ffy fna fnb fnd fnf fnn fnr fns foa fob fof fon foo for fos foy fra frb frd frf frn fro frr frs fry fsa fsb fsd fsf fsn fso fsr fss fy- fya fyb fyn fyo naa nab nad naf nan nao nar nas nay nba nbb nbd nbf nbn nbo nbr nbs nda ndb ndd ndf ndn ndo ndr nds ndy nfa nfb nfd nff nfn nfo nfr nfs nna nnb nnf nnn nno nns no- noa nob nod nof non noo nor nos noy nra nrb nrd nrf nrn nro nrr nrs nry nsa nsb nsd nsf nsn nso nsr nss nsy nya nyd nyf nyn nyo nys nyy oaa oab oad oaf oan oao oar oas ob- oba obb obd obf obn obo obr obs oby oda odb odd odf odn odo odr ods of- ofa ofb ofd off ofn ofo ofr ofs on- ona onb ond onf onn ono onr ons ony oo- ooa oob ood oof oon ooo oor oos or- ora orb ord orf orn oro orr ors ory os- osa osb osd osf osn oso osr oss oya oyd oyo oys ra- raa rab rad raf ran rao rar ras ray rba rbb rbd rbf rbn rbo rbr rbs rda rdb rdd rdf rdn rdo rdr rds rdy rfa rfb rfd rff rfn rfo rfr rfs rna rnb rnd rnn rno rnr rns rny roa rob rod rof ron roo ror ros roy rra rrb rrd rrf rrn rrr rrs rsa rsb rsd rsf rsn rso rsr rss ry- rya ryd ryf ryn ryo ryr rys ryy saa sab sad saf san sao sar sas say sba sbb sbd sbf sbn sbo sbr sbs sby sda sdb sdd sdf sdn sdo sdr sds sdy sfa sfb sfd sff sfn sfo sfr sfs sna snb snd snf snn sno snr sns sny soa sob sod sof son soo sor sos soy sr- sra srb srd srf srn sro srr srs sry ss- ssa ssb ssd ssf ssn sso ssr sss sy- sya syb syd syn syr sys yaa yab yad yaf yan yao yar yas yay ybf ybr ybs yby yda ydn ydo yds ydy yfa yfd yff yfr yfs yna ynd ynn yns yny yob yod yof yon yoo yor yos yoy yra yrf yrn yro yrs ysa ysb yso ysr yss ysy yyb yyf yys yyy