a-a a-b a-t aaa aab aan aao aar aas aat aay ab- aba abb abn abo abr abs abt aby an- ana anb ann ano anr ans ant any aoa aob aon aoo aor aos aot ar- ara arb arn aro arr ars art ary as- asa asb asn aso asr ass ast asy at- ata atb atn ato atr ats att ay- aya ayn ayo ayr ays ayt baa bab ban bao bar bas bat bay bba bbb bbn bbo bbr bbs bbt bby bna bnb bnn bno bnr bns bnt boa bob bon boo bor bos bot boy bra brb brn bro brr brs brt bry bsa bsb bsn bso bsr bss bst bsy bta btb btn bto btr bts btt bty by- bya byn byo byr bys byt naa nab nan nao nar nas nat nay nba nbb nbn nbo nbr nbs nbt nna nnb nnn nno nns nnt no- noa nob non noo nor nos not noy nra nrb nrn nro nrr nrs nrt nry nsa nsb nsn nso nsr nss nst nsy nta ntb ntn nto ntr nts ntt nya nyn nyo nys nyt nyy oaa oab oan oao oar oas oat ob- oba obb obn obo obr obs obt oby on- ona onb onn ono onr ons ont ony oo- ooa oob oon ooo oor oos oot or- ora orb orn oro orr ors ort ory os- osa osb osn oso osr oss ost ot- ota otb otn oto otr ots ott oya oyo oys ra- raa rab ran rao rar ras rat ray rba rbb rbn rbo rbr rbs rbt rna rnb rnn rno rnr rns rnt rny roa rob ron roo ror ros rot roy rra rrb rrn rrr rrs rrt rsa rsb rsn rso rsr rss rst rta rtb rtn rto rtr rts rtt rty ry- rya ryn ryo ryr rys ryy saa sab san sao sar sas sat say sba sbb sbn sbo sbr sbs sbt sby sna snb snn sno snr sns snt sny soa sob son soo sor sos sot soy sr- sra srb srn sro srr srs srt sry ss- ssa ssb ssn sso ssr sss sst sta stb stn sto str sts stt sty sy- sya syb syn syr sys syt taa tab tan tao tar tas tat tay tba tbb tbn tbo tbr tbs tbt tna tnb tnn tno tnr tns tnt to- toa tob ton too tor tos tot toy tra trb trn tro trr trs trt try tsa tsb tsn tso tsr tss tst tsy tta ttb ttn tto ttr tts ttt tty tya tyn tyo tyr tys tyt yaa yab yan yao yar yas yat yay ybr ybs yby yna ynn yns yny yob yon yoo yor yos yot yoy yra yrn yro yrs yrt ysa ysb yso ysr yss yst ysy yta ytn yto ytr yts ytt yyb yys yyt yyy