a-a a-b a-t a-z aaa aab aae aan aat aau aaz ab- aba abb abe abn abt abu abz aea aeb aee aen aet aeu aez an- ana anb ane ann ant anu anz at- ata atb ate atn att atu atz au- aua aub aue aun aut auz az- aza azb aze azn azt azu azz b-u baa bab bae ban bat bau baz bba bbb bbe bbn bbt bbu be- bea beb bee ben bet beu bez bna bnb bne bnn bnt bnu bnz bta btb bte btn btt btu btz bua bub bue bun but buu buz bza bze bzn bzu bzz eaa eab eae ean eat eau eaz eba ebb ebe ebn ebt ebu eea eeb eee een eet en- ena enb ene enn ent enu enz eta etb ete etn ett etu etz eu- eua eub eue eun eut eze ezz naa nab nae nan nat nau naz nba nbb nbe nbn nbt nbu ne- nea neb nee nen net neu nez nna nnb nne nnn nnt nnu nnz nta ntb nte ntn ntt ntu ntz nua nub nue nun nut nuu nzb nze nzz taa tab tae tan tat tau taz tba tbb tbe tbn tbt tbu tbz te- tea teb tee ten tet teu tez tna tnb tne tnn tnt tnz tta ttb tte ttn ttt ttu tua tub tue tun tut tuu tuz tza tze tzu ua- uaa uab uae uan uat uau uaz uba ubb ube ubn ubt ubu uea ueb uee uen uet un- una unb une unn unt unu uta utb ute utn utt utu utz uua uue uun uut uuu uza uzb uzu zaa zab zan zat zaz zbb zbt zea zeb zee zen zet zez zne znn zta zte zub zun zut zuz zzt zzz