-th a-a a-b a-c a-t aaa aab aac aah aan aas aat aay ab- aba abb abc abh abn abs abt aby ac- aca acb acc ach acn acs act acy aha ahb ahc ahh ahn ahs aht ahy an- ana anb anc anh ann ans ant any as- asa asb asc ash asn ass ast asy at- ata atb atc ath atn ats att ay- aya ayc ayh ayn ays ayt baa bab bac bah ban bas bat bay bba bbb bbc bbh bbn bbs bbt bby bca bcb bcc bch bcn bcs bct bcy bha bhb bhc bhh bhs bht bna bnb bnc bnn bns bnt bsa bsb bsc bsh bsn bss bst bsy bta btb btc bth btn bts btt bty by- bya byc byh byn bys byt c-- caa cab cac cah can cas cat cay cba cbb cbc cbh cbn cbs cbt cby cca ccb ccc cch ccn ccs cct ch- cha chb chc chh chn chs cht chy cn- cna cnb cnc cnh cnn cns cnt cny csa csb csc csh csn css cst csy cta ctb ctc cth ctn cts ctt cty cya cyb cyc cyn cys cyt haa hab hac hah han has hat hay hba hbb hbc hbh hbn hbs hbt hby hca hcb hcc hch hcn hcs hct hcy hha hhb hhc hhh hhn hhs hht hhy hna hnb hnc hnh hnn hns hnt hny hsa hsb hsc hsh hsn hss hst hsy hta htb htc hth htn hts htt hty hy- hya hyb hyc hyh hyn hys hyt hyy naa nab nac nah nan nas nat nay nba nbb nbc nbn nbs nbt nca ncb ncc nch ncn ncs nct nha nhb nhc nhh nhn nhs nht nhy nna nnb nnc nnh nnn nns nnt nsa nsb nsc nsh nsn nss nst nsy nta ntb ntc nth ntn nts ntt nya nyc nyn nys nyt nyy saa sab sac sah san sas sat say sba sbb sbc sbh sbn sbs sbt sby sca scb scc sch scn scs sct sh- sha shb shc shh shn shs sht shy sna snb snc snn sns snt sny ss- ssa ssb ssc ssh ssn sss sst sta stb stc sth stn sts stt sty sy- sya syb syc syh syn sys syt taa tab tac tah tan tas tat tay tba tbb tbc tbh tbn tbs tbt tca tcb tcc tch tcn tcs tct th- tha thb thc thh thn ths tht thy tna tnb tnc tnh tnn tns tnt tsa tsb tsc tsh tsn tss tst tsy tta ttb ttc tth ttn tts ttt tty tya tyc tyn tys tyt yaa yab yac yah yan yas yat yay ybc ybs yby yca ycc ych ycs ycy yha yhc yhs yht yna ynn yns yny ysa ysb ysc yss yst ysy yta ytc yth ytn yts ytt yyb yyc yys yyt yyy