a-a a-b a-c a-t aaa aab aac aag aak aat ab- aba abb abc abg abk abt ac- aca acb acc acg ack act ag- aga agb agc agg agk agt aka akb akc akg akk at- ata atb atc atg att baa bab bac bag bak bat bba bbb bbc bbg bbk bbt bca bcb bcc bcg bck bct bga bgb bgc bgg bgk bgt bka bkb bkc bkg bkk bkt bta btb btc btg btk btt c-- caa cab cac cag cak cat cba cbb cbc cbg cbk cbt cca ccb ccc ccg cck cct cga cgb cgc cgg cgt cka ckb ckc ckt cta ctb ctc ctg ctk ctt gaa gab gac gag gak gat gba gbc gbg gbk gbt gca gcb gcc gcg gck gct gga ggb ggc ggg ggt gka gkb gkt gta gtb gtc gtg gtk gtt k-t ka- kaa kab kac kag kak kat kba kbb kbc kbk kca kcb kcc kcg kck kct kga kgb kgc kkb kkc kkk kkt kta ktb ktc ktg ktk ktt taa tab tac tag tak tat tba tbb tbc tbg tbk tbt tca tcb tcc tcg tck tct tga tgb tgc tgg tgk tgt tka tkb tkc tkg tkk tkt tta ttb ttc ttg ttk ttt