a-a a-b a-i a-t aaa aab aae aai aas aat aau aax ab- aba abb abe abi abs abt abu abx aea aeb aee aei aes aet aeu aex ai- aia aib aie aii ais ait aiu aix as- asa asb ase asi ass ast asu asx at- ata atb ate ati ats att atu atx au- aua aub aue aui aus aut aux ax- axa axe axi axs axt axx b-u baa bab bae bai bas bat bau bax bba bbb bbe bbi bbs bbt bbu bbx be- bea beb bee bei bes bet beu bex bi- bia bib bie bii bis bit biu bix bsa bsb bse bsi bss bst bsu bsx bta btb bte bti bts btt btu btx bua bub bue bui bus but buu bux bxb bxi bxx eaa eab eae eai eas eat eau eax eba ebb ebe ebi ebs ebt ebu ebx eea eeb eee ees eet eex eia eib eie eii eis eit eiu eix es- esa esb ese esi ess est esu esx eta etb ete eti ets ett etu etx eu- eua eub eue eui eus eut eux ex- exa exe exi exs ext exu exx ia- iaa iab iae iai ias iat iau iba ibb ibe ibi ibs ibt ibu ibx ie- iea iee iei ies iet iex iia iib iie iii iis iit iiu iix is- isa isb ise isi iss ist isu ita itb ite iti its itt itu itx iu- iua iub iue iui ius iut ixe ixi saa sab sae sai sas sat sau sax sba sbb sbe sbi sbs sbt sbu sbx se- sea seb see sei ses set seu sex sia sib sie sii sis sit siu six ss- ssa ssb sse ssi sss sst ssu ssx sta stb ste sti sts stt stu stx sua sub sue sui sus sut suu sux sxi sxs sxt sxu t-x taa tab tae tai tas tat tau tax tba tbb tbe tbi tbs tbt tbu te- tea teb tee tei tes tet teu tex tia tib tie tii tis tit tiu tix tsa tsb tse tsi tss tst tsu tsx tta ttb tte tti tts ttt ttu ttx tua tub tue tui tus tut tuu tux txe txi txs txt txu ua- uaa uab uae uai uas uat uau uba ubb ube ubi ubs ubt ubu ubx uea ueb uee uei ues uet uia uib uie uii uis uit uiu usa usb use usi uss ust usu usx uta utb ute uti uts utt utu utx uua uue uus uut uuu uxb uxt uxu xaa xas xat xau xbe xbx xee xes xet xeu xex xia xie xii xis xit xiu xix xsa xsb xsi xss xst xti xts xtx xue xui xus xxi xxx