a-a a-b a-t aaa aab aad aak aan aat ab- aba abb abd abk abn abt ad- ada adb add adk adn adt aka akb akd akk akn an- ana anb and ank ann ant at- ata atb atd atn att baa bab bad bak ban bat bba bbb bbd bbk bbn bbt bda bdb bdd bdk bdt bka bkb bkk bkn bkt bna bnb bnd bnk bnn bnt bta btb btd btk btn btt daa dab dad dak dan dat dba dbb dbd dbk dbn dbt dda ddb ddd ddk ddn ddt dka dkb dkk dkt dna dnb dnd dnk dnn dnt dta dtb dtd dtk dtn dtt k-t ka- kaa kab kad kak kan kat kba kbb kbd kbk kbn kda kdb kdk kdt kkb kkk kkn kkt kn- kna knd knk knn knt kta ktb ktk ktn ktt naa nab nad nak nan nat nba nbb nbd nbk nbn nbt nda ndb ndd ndk ndn ndt nka nkk nkn nkt nna nnb nnk nnn nnt nta ntb ntd ntk ntn ntt taa tab tad tak tan tat tba tbb tbd tbk tbn tbt tda tdb tdd tdk tdn tdt tka tkb tkk tkt tna tnb tnd tnk tnn tnt tta ttb ttd ttk ttn ttt