a-a a-b a-t aaa aab aan aar aas aat aay ab- aba abb abn abr abs abt aby an- ana anb ann anr ans ant any ar- ara arb arn arr ars art ary as- asa asb asn asr ass ast asy at- ata atb atn atr ats att ay- aya ayn ayr ays ayt baa bab ban bar bas bat bay bba bbb bbn bbr bbs bbt bby bna bnb bnn bnr bns bnt bra brb brn brr brs brt bry bsa bsb bsn bsr bss bst bsy bta btb btn btr bts btt bty by- bya byn byr bys byt naa nab nan nar nas nat nay nba nbb nbn nbr nbs nbt nna nnb nnn nns nnt nra nrb nrn nrr nrs nrt nry nsa nsb nsn nsr nss nst nsy nta ntb ntn ntr nts ntt nya nyn nys nyt nyy ra- raa rab ran rar ras rat ray rba rbb rbn rbr rbs rbt rna rnb rnn rnr rns rnt rny rra rrb rrn rrr rrs rrt rsa rsb rsn rsr rss rst rta rtb rtn rtr rts rtt rty ry- rya ryn ryr rys ryy saa sab san sar sas sat say sba sbb sbn sbr sbs sbt sby sna snb snn snr sns snt sny sr- sra srb srn srr srs srt sry ss- ssa ssb ssn ssr sss sst sta stb stn str sts stt sty sy- sya syb syn syr sys syt taa tab tan tar tas tat tay tba tbb tbn tbr tbs tbt tna tnb tnn tnr tns tnt tra trb trn trr trs trt try tsa tsb tsn tsr tss tst tsy tta ttb ttn ttr tts ttt tty tya tyn tyr tys tyt yaa yab yan yar yas yat yay ybr ybs yby yna ynn yns yny yra yrn yrs yrt ysa ysb ysr yss yst ysy yta ytn ytr yts ytt yyb yys yyt yyy