-th a-a a-b a-c a-t aaa aab aac aah aak aas aat aay ab- aba abb abc abh abk abs abt aby ac- aca acb acc ach ack acs act acy aha ahb ahc ahh ahk ahs aht ahy aka akb akc akh akk aks as- asa asb asc ash ask ass ast asy at- ata atb atc ath ats att ay- aya ayc ayh ayk ays ayt baa bab bac bah bak bas bat bay bba bbb bbc bbh bbk bbs bbt bby bca bcb bcc bch bck bcs bct bcy bha bhb bhc bhh bhk bhs bht bka bkb bkc bkk bks bkt bsa bsb bsc bsh bsk bss bst bsy bta btb btc bth btk bts btt bty by- bya byc byh byk bys byt c-- caa cab cac cah cak cas cat cay cba cbb cbc cbh cbk cbs cbt cby cca ccb ccc cch cck ccs cct ch- cha chb chc chh chk chs cht chy cka ckb ckc ckh cks ckt cky csa csb csc csh csk css cst csy cta ctb ctc cth ctk cts ctt cty cya cyb cyc cyk cys cyt haa hab hac hah hak has hat hay hba hbb hbc hbh hbk hbs hbt hby hca hcb hcc hch hck hcs hct hcy hha hhb hhc hhh hhk hhs hht hhy hka hkb hkh hkk hks hkt hsa hsb hsc hsh hsk hss hst hsy hta htb htc hth htk hts htt hty hy- hya hyb hyc hyh hys hyt hyy k-t ka- kaa kab kac kah kak kas kat kay kba kbb kbc kbh kbk kbs kca kcb kcc kch kck kcs kct kha khh khk khs kkb kkc kkh kkk kks kkt kky ksa ksb ksc ksh ksk kss kst kta ktb ktc kth ktk kts ktt kya kyc kys kyt saa sab sac sah sak sas sat say sba sbb sbc sbh sbk sbs sbt sby sca scb scc sch sck scs sct sh- sha shb shc shh shk shs sht shy sk- ska skb skc skh skk sks skt sky ss- ssa ssb ssc ssh ssk sss sst sta stb stc sth stk sts stt sty sy- sya syb syc syh syk sys syt taa tab tac tah tak tas tat tay tba tbb tbc tbh tbk tbs tbt tca tcb tcc tch tck tcs tct th- tha thb thc thh thk ths tht thy tka tkb tkc tkk tks tkt tky tsa tsb tsc tsh tsk tss tst tsy tta ttb ttc tth ttk tts ttt tty tya tyc tys tyt yaa yab yac yah yak yas yat yay ybc ybs yby yca ycc ych ycs ycy yha yhc yhs yht yka ykk ysa ysb ysc ysk yss yst ysy yta ytc yth ytk yts ytt yyb yyc yys yyt yyy