a-a a-b a-t a-z aaa aab aad aan aao aat aaz ab- aba abb abd abn abo abt abz ad- ada adb add adn ado adt adz an- ana anb and ann ano ant anz aoa aob aod aon aoo aot at- ata atb atd atn ato att atz az- aza azb azd azn azo azt azz baa bab bad ban bao bat baz bba bbb bbd bbn bbo bbt bda bdb bdd bdo bdt bdz bna bnb bnd bnn bno bnt bnz boa bob bod bon boo bot boz bta btb btd btn bto btt btz bza bzd bzn bzo bzz daa dab dad dan dao dat daz dba dbb dbd dbn dbo dbt dbz dda ddb ddd ddn ddo ddt ddz dna dnb dnd dnn dno dnt dnz doa dob dod don doo dot doz dta dtb dtd dtn dto dtt dtz dza dzb dzd dzo naa nab nad nan nao nat naz nba nbb nbd nbn nbo nbt nda ndb ndd ndn ndo ndt nna nnb nnn nno nnt nnz no- noa nob nod non noo not noz nta ntb ntd ntn nto ntt ntz nzb nzd nzo nzz oaa oab oad oan oao oat ob- oba obb obd obn obo obt oda odb odd odn odo odt on- ona onb ond onn ono ont oo- ooa oob ood oon ooo oot ot- ota otb otd otn oto ott otz oza ozo ozt ozz taa tab tad tan tao tat taz tba tbb tbd tbn tbo tbt tbz tda tdb tdd tdn tdo tdt tna tnb tnd tnn tno tnt tnz to- toa tob tod ton too tot toz tta ttb ttd ttn tto ttt tza tzd zaa zab zad zan zao zat zaz zbb zbt zdt znd znn zno zo- zoa zob zod zon zoo zot zta zzt zzz