-th a-a a-b a-c a-t aaa aab aac aah aas aat aau aay ab- aba abb abc abh abs abt abu aby ac- aca acb acc ach acs act acu acy aha ahb ahc ahh ahs aht ahu ahy as- asa asb asc ash ass ast asu asy at- ata atb atc ath ats att atu au- aua aub auc auh aus aut ay- aya ayc ayh ays ayt ayu b-u baa bab bac bah bas bat bau bay bba bbb bbc bbh bbs bbt bbu bby bca bcb bcc bch bcs bct bcu bcy bha bhb bhc bhh bhs bht bhu bsa bsb bsc bsh bss bst bsu bsy bta btb btc bth bts btt btu bty bua bub buc buh bus but buu buy by- bya byc byh bys byt byu c-- caa cab cac cah cas cat cau cay cba cbb cbc cbh cbs cbt cbu cby cca ccb ccc cch ccs cct ccu ch- cha chb chc chh chs cht chu chy csa csb csc csh css cst csu csy cta ctb ctc cth cts ctt ctu cty cua cub cuc cuh cus cut cuu cuy cya cyb cyc cys cyt haa hab hac hah has hat hau hay hba hbb hbc hbh hbs hbt hbu hby hca hcb hcc hch hcs hct hcy hha hhb hhc hhh hhs hht hhu hhy hsa hsb hsc hsh hss hst hsu hsy hta htb htc hth hts htt hty hua hub huc huh hus hut huu huy hy- hya hyb hyc hyh hys hyt hyy saa sab sac sah sas sat sau say sba sbb sbc sbh sbs sbt sbu sby sca scb scc sch scs sct scu sh- sha shb shc shh shs sht shu shy ss- ssa ssb ssc ssh sss sst ssu sta stb stc sth sts stt stu sty sua sub suc suh sus sut suu suy sy- sya syb syc syh sys syt syu taa tab tac tah tas tat tau tay tba tbb tbc tbh tbs tbt tbu tca tcb tcc tch tcs tct tcu th- tha thb thc thh ths tht thu thy tsa tsb tsc tsh tss tst tsu tsy tta ttb ttc tth tts ttt ttu tty tua tub tuc tuh tus tut tuu tuy tya tyc tys tyt ua- uaa uab uac uah uas uat uau uay uba ubb ubc ubh ubs ubt ubu uby uca ucb ucc uch ucs uct ucu uha uhb uhc uhh uhs uht uhu uhy usa usb usc ush uss ust usu uta utb utc uth uts utt utu uty uua uuc uus uut uuu uyc uys uyu yaa yab yac yah yas yat yau yay ybc ybs yby yca ycc ych ycs ycu ycy yha yhc yhs yht yhu ysa ysb ysc yss yst ysu ysy yta ytc yth yts ytt ytu yua yuh yus yut yuu yuy yyb yyc yys yyt yyu yyy