a-a a-b a-t aaa aab aaf aan aao aar aas aat aay ab- aba abb abf abn abo abr abs abt aby af- afa afb aff afn afo afr afs aft afy an- ana anb anf ann ano anr ans ant any aoa aob aof aon aoo aor aos aot ar- ara arb arf arn aro arr ars art ary as- asa asb asf asn aso asr ass ast asy at- ata atb atf atn ato atr ats att ay- aya ayf ayn ayo ayr ays ayt baa bab baf ban bao bar bas bat bay bba bbb bbf bbn bbo bbr bbs bbt bby bfa bfb bff bfn bfo bfr bfs bft bfy bna bnb bnf bnn bno bnr bns bnt boa bob bof bon boo bor bos bot boy bra brb brf brn bro brr brs brt bry bsa bsb bsf bsn bso bsr bss bst bsy bta btb btf btn bto btr bts btt bty by- bya byf byn byo byr bys byt faa fab faf fan fao far fas fat fay fba fbb fbf fbn fbo fbr fbs fbt ffa fff ffn ffo ffr ffs fft ffy fna fnb fnf fnn fnr fns fnt foa fob fof fon foo for fos fot foy fra frb frf frn fro frr frs frt fry fsa fsb fsf fsn fso fsr fss fst fta ftb ftf ftn fto ftr fts ftt fty fy- fya fyb fyn fyo naa nab naf nan nao nar nas nat nay nba nbb nbf nbn nbo nbr nbs nbt nfa nfb nff nfn nfo nfr nfs nft nna nnb nnf nnn nno nns nnt no- noa nob nof non noo nor nos not noy nra nrb nrf nrn nro nrr nrs nrt nry nsa nsb nsf nsn nso nsr nss nst nsy nta ntb ntf ntn nto ntr nts ntt nya nyf nyn nyo nys nyt nyy oaa oab oaf oan oao oar oas oat ob- oba obb obf obn obo obr obs obt oby of- ofa ofb off ofn ofo ofr ofs oft on- ona onb onf onn ono onr ons ont ony oo- ooa oob oof oon ooo oor oos oot or- ora orb orf orn oro orr ors ort ory os- osa osb osf osn oso osr oss ost ot- ota otb otf otn oto otr ots ott oya oyo oys ra- raa rab raf ran rao rar ras rat ray rba rbb rbf rbn rbo rbr rbs rbt rfa rfb rff rfn rfo rfr rfs rft rna rnb rnn rno rnr rns rnt rny roa rob rof ron roo ror ros rot roy rra rrb rrf rrn rrr rrs rrt rsa rsb rsf rsn rso rsr rss rst rta rtb rtf rtn rto rtr rts rtt rty ry- rya ryf ryn ryo ryr rys ryy saa sab saf san sao sar sas sat say sba sbb sbf sbn sbo sbr sbs sbt sby sfa sfb sff sfn sfo sfr sfs sft sna snb snf snn sno snr sns snt sny soa sob sof son soo sor sos sot soy sr- sra srb srf srn sro srr srs srt sry ss- ssa ssb ssf ssn sso ssr sss sst sta stb stf stn sto str sts stt sty sy- sya syb syn syr sys syt taa tab taf tan tao tar tas tat tay tba tbb tbf tbn tbo tbr tbs tbt tfa tfb tff tfn tfo tfr tfs tft tna tnb tnf tnn tno tnr tns tnt to- toa tob tof ton too tor tos tot toy tra trb trf trn tro trr trs trt try tsa tsb tsf tsn tso tsr tss tst tsy tta ttb ttf ttn tto ttr tts ttt tty tya tyf tyn tyo tyr tys tyt yaa yab yaf yan yao yar yas yat yay ybf ybr ybs yby yfa yff yfr yfs yft yna ynn yns yny yob yof yon yoo yor yos yot yoy yra yrf yrn yro yrs yrt ysa ysb yso ysr yss yst ysy yta ytf ytn yto ytr yts ytt yyb yyf yys yyt yyy