a-a a-b a-z aaa aab aad aae aan aau aaz ab- aba abb abd abe abn abu abz ad- ada adb add ade adn adu adz aea aeb aed aee aen aeu aez an- ana anb and ane ann anu anz au- aua aub aud aue aun auz az- aza azb azd aze azn azu azz b-u baa bab bad bae ban bau baz bba bbb bbd bbe bbn bbu bda bdb bdd bde bdu bdz be- bea beb bed bee ben beu bez bna bnb bnd bne bnn bnu bnz bua bub bud bue bun buu buz bza bzd bze bzn bzu bzz daa dab dad dae dan dau daz dba dbb dbd dbe dbn dbu dbz dda ddb ddd dde ddn ddu ddz de- dea deb ded dee den deu dez dna dnb dnd dne dnn dnz dua dub dud due dun duz dza dzb dzd dze dzu eaa eab ead eae ean eau eaz eba ebb ebd ebe ebn ebu ed- eda edb edd ede edn edu eea eeb eed eee een en- ena enb end ene enn enu enz eu- eua eub eud eue eun eze ezz naa nab nad nae nan nau naz nba nbb nbd nbe nbn nbu nda ndb ndd nde ndn ndu ne- nea neb ned nee nen neu nez nna nnb nne nnn nnu nnz nua nub nud nue nun nuu nzb nzd nze nzz ua- uaa uab uad uae uan uau uaz uba ubb ube ubn ubu uda udb udd ude udn udu uea ueb ued uee uen un- una unb und une unn unu uua uue uun uuu uza uzb uzu zaa zab zad zan zaz zbb zea zeb zed zee zen zez znd zne znn zub zud zun zuz zzz