a-a a-b a-z aaa aab aad aan aao aau aaz ab- aba abb abd abn abo abu abz ad- ada adb add adn ado adu adz an- ana anb and ann ano anu anz aoa aob aod aon aoo aou au- aua aub aud aun auo auz az- aza azb azd azn azo azu azz b-u baa bab bad ban bao bau baz bba bbb bbd bbn bbo bbu bda bdb bdd bdo bdu bdz bna bnb bnd bnn bno bnu bnz boa bob bod bon boo bou boz bua bub bud bun buo buu buz bza bzd bzn bzo bzu bzz daa dab dad dan dao dau daz dba dbb dbd dbn dbo dbu dbz dda ddb ddd ddn ddo ddu ddz dna dnb dnd dnn dno dnz doa dob dod don doo dou doz dua dub dud dun duo duz dza dzb dzd dzo dzu naa nab nad nan nao nau naz nba nbb nbd nbn nbo nbu nda ndb ndd ndn ndo ndu nna nnb nnn nno nnu nnz no- noa nob nod non noo nou noz nua nub nud nun nuo nuu nzb nzd nzo nzz oaa oab oad oan oao oau ob- oba obb obd obn obo obu oda odb odd odn odo odu on- ona onb ond onn ono onu oo- ooa oob ood oon ooo ou- oua oud oun ouo oza ozo ozu ozz ua- uaa uab uad uan uao uau uaz uba ubb ubn ubo ubu uda udb udd udn udo udu un- una unb und unn uno unu uoa uob uod uon uoo uua uun uuu uza uzb uzo uzu zaa zab zad zan zao zaz zbb znd znn zno zo- zoa zob zod zon zoo zou zub zud zun zuz zzz