a-a a-b a-z aaa aab aae aak aan aau aaz ab- aba abb abe abk abn abu abz aea aeb aee aek aen aeu aez aka akb ake akk akn aku an- ana anb ane ank ann anu anz au- aua aub aue auk aun auz az- aza azb aze azn azu azz b-u baa bab bae bak ban bau baz bba bbb bbe bbk bbn bbu be- bea beb bee bek ben beu bez bka bkb bke bkk bkn bna bnb bne bnk bnn bnu bnz bua bub bue buk bun buu buz bza bze bzn bzu bzz eaa eab eae eak ean eau eaz eba ebb ebe ebk ebn ebu eea eeb eee eek een eka ekb eke eku en- ena enb ene enk enn enu enz eu- eua eub eue eun eze ezz k-z ka- kaa kab kae kak kan kau kaz kba kbb kbe kbk kbn kbu kbz ke- kea keb kee kek ken kez kkb kke kkk kkn kku kn- kna kne knk knn knu kub kue kuk kun kuu naa nab nae nak nan nau naz nba nbb nbe nbk nbn nbu ne- nea neb nee nek nen neu nez nka nke nkk nkn nku nna nnb nne nnk nnn nnu nnz nua nub nue nuk nun nuu nzb nze nzz ua- uaa uab uae uak uan uau uaz uba ubb ube ubk ubn ubu uea ueb uee uen uka ukb uke ukk ukn uku ukz un- una unb une unk unn unu uua uue uun uuu uza uzb uzu zaa zab zak zan zaz zbb zea zeb zee zek zen zez zka zne znn zub zuk zun zuz zzz