a-a a-b a-t a-z aaa aab aam aan aao aat aaz ab- aba abb abm abn abo abt abz ama amb amm amn amo amt amz an- ana anb anm ann ano ant anz aoa aob aom aon aoo aot at- ata atb atm atn ato att atz az- aza azb azm azn azo azt azz baa bab bam ban bao bat baz bba bbb bbm bbn bbo bbt bma bmb bmm bmn bmo bmt bmz bna bnb bnn bno bnt bnz boa bob bom bon boo bot boz bta btb btm btn bto btt btz bza bzn bzo bzz m-o maa mab mam man mao mat maz mba mbb mbm mbo mbt mma mmb mmm mmn mmo mmt mmz mna mnb mnm mnn mno mnt mnz moa mob mom mon moo mot moz mta mtb mtm mtn mto mtt mza mzb mzm mzn mzt naa nab nam nan nao nat naz nba nbb nbm nbn nbo nbt nma nmb nmm nmn nmo nmt nmz nna nnb nnm nnn nno nnt nnz no- noa nob nom non noo not noz nta ntb ntm ntn nto ntt ntz nzb nzo nzz oaa oab oam oan oao oat ob- oba obb obm obn obo obt om- oma omb omm omn omo omt omz on- ona onb onn ono ont oo- ooa oob oom oon ooo oot ot- ota otb otm otn oto ott otz oza ozm ozo ozt ozz taa tab tam tan tao tat taz tba tbb tbm tbn tbo tbt tbz tma tmb tmm tmn tmo tmt tmz tna tnb tnm tnn tno tnt tnz to- toa tob tom ton too tot toz tta ttb ttm ttn tto ttt tza zaa zab zam zan zao zat zaz zbb zbm zbt zma zmb zmm zmt znn zno zo- zoa zob zom zon zoo zot zta ztm zzt zzz