a-a a-b a-t aaa aab aag aak aat ab- aba abb abg abk abt ag- aga agb agg agk agt aka akb akg akk at- ata atb atg att baa bab bag bak bat bba bbb bbg bbk bbt bga bgb bgg bgk bgt bka bkb bkg bkk bkt bta btb btg btk btt gaa gab gag gak gat gba gbg gbk gbt gga ggb ggg ggt gka gkb gkt gta gtb gtg gtk gtt k-t ka- kaa kab kag kak kat kba kbb kbk kga kgb kkb kkk kkt kta ktb ktg ktk ktt taa tab tag tak tat tba tbb tbg tbk tbt tga tgb tgg tgk tgt tka tkb tkg tkk tkt tta ttb ttg ttk ttt