-th a-a a-b a-c a-t aaa aab aac aah aas aat aau aax ab- aba abb abc abh abs abt abu abx ac- aca acb acc ach acs act acu acx aha ahb ahc ahh ahs aht ahu ahx as- asa asb asc ash ass ast asu asx at- ata atb atc ath ats att atu atx au- aua aub auc auh aus aut aux ax- axa axh axs axt axx b-u baa bab bac bah bas bat bau bax bba bbb bbc bbh bbs bbt bbu bbx bca bcb bcc bch bcs bct bcu bcx bha bhb bhc bhh bhs bht bhu bhx bsa bsb bsc bsh bss bst bsu bsx bta btb btc bth bts btt btu btx bua bub buc buh bus but buu bux bxb bxx c-- caa cab cac cah cas cat cau cax cba cbb cbc cbh cbs cbt cbu cbx cca ccb ccc cch ccs cct ccu ccx ch- cha chb chc chh chs cht chu chx csa csb csc csh css cst csu csx cta ctb ctc cth cts ctt ctu ctx cua cub cuc cuh cus cut cuu cxc cxh cxs cxt cxx haa hab hac hah has hat hau hax hba hbb hbc hbh hbs hbt hbu hbx hca hcb hcc hch hcs hct hha hhb hhc hhh hhs hht hhu hsa hsb hsc hsh hss hst hsu hsx hta htb htc hth hts htt htx hua hub huc huh hus hut huu hux hxc saa sab sac sah sas sat sau sax sba sbb sbc sbh sbs sbt sbu sbx sca scb scc sch scs sct scu scx sh- sha shb shc shh shs sht shu ss- ssa ssb ssc ssh sss sst ssu ssx sta stb stc sth sts stt stu stx sua sub suc suh sus sut suu sux sxc sxs sxt sxu t-x taa tab tac tah tas tat tau tax tba tbb tbc tbh tbs tbt tbu tca tcb tcc tch tcs tct tcu tcx th- tha thb thc thh ths tht thu thx tsa tsb tsc tsh tss tst tsu tsx tta ttb ttc tth tts ttt ttu ttx tua tub tuc tuh tus tut tuu tux txs txt txu ua- uaa uab uac uah uas uat uau uba ubb ubc ubh ubs ubt ubu ubx uca ucb ucc uch ucs uct ucu uha uhb uhc uhh uhs uht uhu usa usb usc ush uss ust usu usx uta utb utc uth uts utt utu utx uua uuc uus uut uuu uxb uxc uxt uxu xaa xac xas xat xau xbc xbx xcb xch xcx xht xsa xsb xsc xss xst xtc xts xtx xus xxx