a-a a-b aaa aab aag aan aao aar aas aay ab- aba abb abg abn abo abr abs aby ag- aga agb agg agn ago agr ags agy an- ana anb ang ann ano anr ans any aoa aob aog aon aoo aor aos ar- ara arb arg arn aro arr ars ary as- asa asb asg asn aso asr ass asy ay- aya ayn ayo ayr ays baa bab bag ban bao bar bas bay bba bbb bbg bbn bbo bbr bbs bby bga bgb bgg bgn bgo bgr bgs bna bnb bng bnn bno bnr bns boa bob bog bon boo bor bos boy bra brb brg brn bro brr brs bry bsa bsb bsg bsn bso bsr bss bsy by- bya byg byn byo byr bys gaa gab gag gan gao gar gas gay gba gbg gbn gbo gbr gbs gby gga ggb ggg ggn ggo ggr ggs gna gnb gnn gno gnr gns goa gob gog gon goo gor gos goy gra grb grg grn gro grr grs gry gsa gsb gsg gsn gso gsr gss gy- gya gyb gyn gyo gyr gys naa nab nag nan nao nar nas nay nba nbb nbg nbn nbo nbr nbs nga ngb ngg ngn ngo ngs nna nnb nng nnn nno nns no- noa nob nog non noo nor nos noy nra nrb nrg nrn nro nrr nrs nry nsa nsb nsg nsn nso nsr nss nsy nya nyg nyn nyo nys nyy oaa oab oag oan oao oar oas ob- oba obb obg obn obo obr obs oby oga ogg ogn ogo ogs ogy on- ona onb ong onn ono onr ons ony oo- ooa oob oog oon ooo oor oos or- ora orb org orn oro orr ors ory os- osa osb osg osn oso osr oss oya oyo oys ra- raa rab rag ran rao rar ras ray rba rbb rbg rbn rbo rbr rbs rga rgb rgg rgn rgo rgr rgs rna rnb rng rnn rno rnr rns rny roa rob rog ron roo ror ros roy rra rrb rrg rrn rrr rrs rsa rsb rsg rsn rso rsr rss ry- rya ryg ryn ryo ryr rys ryy saa sab sag san sao sar sas say sba sbb sbg sbn sbo sbr sbs sby sga sgb sgg sgn sgo sgr sgs sna snb sng snn sno snr sns sny soa sob sog son soo sor sos soy sr- sra srb srg srn sro srr srs sry ss- ssa ssb ssg ssn sso ssr sss sy- sya syb syg syn syr sys yaa yab yag yan yao yar yas yay ybg ybr ybs yby yga ygo yna yng ynn yns yny yob yog yon yoo yor yos yoy yra yrg yrn yro yrs ysa ysb ysg yso ysr yss ysy yyb yyg yys yyy