a-a a-b a-i a-t aaa aab aad aae aai aat aau aax ab- aba abb abd abe abi abt abu abx ad- ada adb add ade adi adt adu adx aea aeb aed aee aei aet aeu aex ai- aia aib aid aie aii ait aiu aix at- ata atb atd ate ati att atu atx au- aua aub aud aue aui aut aux ax- axa axe axi axt axx b-u baa bab bad bae bai bat bau bax bba bbb bbd bbe bbi bbt bbu bbx bda bdb bdd bde bdi bdt bdu bdx be- bea beb bed bee bei bet beu bex bi- bia bib bid bie bii bit biu bix bta btb btd bte bti btt btu btx bua bub bud bue bui but buu bux bxb bxd bxi bxx daa dab dad dae dai dat dau dax dba dbb dbd dbe dbi dbt dbu dbx dda ddb ddd dde ddi ddt ddu ddx de- dea deb ded dee dei det deu dex di- dia dib did die dii dit diu dix dta dtb dtd dte dti dtt dtu dtx dua dub dud due dui dut dux dxd dxi dxt dxx eaa eab ead eae eai eat eau eax eba ebb ebd ebe ebi ebt ebu ebx ed- eda edb edd ede edi edt edu edx eea eeb eed eee eet eex eia eib eid eie eii eit eiu eix eta etb etd ete eti ett etu etx eu- eua eub eud eue eui eut eux ex- exa exd exe exi ext exu exx i-d ia- iaa iab iad iae iai iat iau iba ibb ibd ibe ibi ibt ibu ibx ida idb idd ide idi idt idu idx ie- iea ied iee iei iet iex iia iib iid iie iii iit iiu iix ita itb itd ite iti itt itu itx iu- iua iub iud iue iui iut ixe ixi t-x taa tab tad tae tai tat tau tax tba tbb tbd tbe tbi tbt tbu tda tdb tdd tde tdi tdt tdu tdx te- tea teb ted tee tei tet teu tex tia tib tid tie tii tit tiu tix tta ttb ttd tte tti ttt ttu ttx tua tub tud tue tui tut tuu tux txe txi txt txu ua- uaa uab uad uae uai uat uau uba ubb ube ubi ubt ubu ubx uda udb udd ude udi udt udu udx uea ueb ued uee uei uet uia uib uid uie uii uit uiu uta utb utd ute uti utt utu utx uua uue uut uuu uxb uxt uxu xaa xad xat xau xbe xbx xda xdb xde xdi xdt xed xee xet xeu xex xia xie xii xit xiu xix xti xtx xue xui xxi xxx