a-a a-b a-z aaa aab aak aam aan aao aaz ab- aba abb abk abm abn abo abz aka akb akk akm akn ako ama amb amk amm amn amo amz an- ana anb ank anm ann ano anz aoa aob aok aom aon aoo az- aza azb azm azn azo azz baa bab bak bam ban bao baz bba bbb bbk bbm bbn bbo bka bkb bkk bkm bkn bko bma bmb bmk bmm bmn bmo bmz bna bnb bnk bnn bno bnz boa bob bok bom bon boo boz bza bzn bzo bzz k-z ka- kaa kab kak kam kan kao kaz kba kbb kbk kbm kbn kbo kbz kkb kkk kkm kkn kma kmb kmk kmm kmo kmz kn- kna knk knm knn kno koa kob kok kom kon koo koz kzo m-o maa mab mak mam man mao maz mba mbb mbk mbm mbo mka mkb mkk mkm mkn mko mkz mma mmb mmk mmm mmn mmo mmz mna mnb mnk mnm mnn mno mnz moa mob mok mom mon moo moz mza mzb mzm mzn naa nab nak nam nan nao naz nba nbb nbk nbm nbn nbo nka nkk nkm nkn nko nma nmb nmk nmm nmn nmo nmz nna nnb nnk nnm nnn nno nnz no- noa nob nok nom non noo noz nzb nzo nzz oaa oab oak oam oan oao ob- oba obb obk obm obn obo oka okb okk oko om- oma omb omm omn omo omz on- ona onb onk onn ono oo- ooa oob ook oom oon ooo oza ozm ozo ozz zaa zab zak zam zan zao zaz zbb zbm zka zma zmb zmk zmm znn zno zo- zoa zob zok zom zon zoo zzz