-th a-a a-c a-t aaa aac aae aag aah aan aat aax ac- aca acc ace acg ach acn act acx aea aec aee aeg aeh aen aet aex ag- aga agc age agg agh agn agt agx aha ahc ahe ahg ahh ahn aht ahx an- ana anc ane ang anh ann ant anx at- ata atc ate atg ath atn att atx ax- axa axe axh axn axt axx c-- caa cac cae cag cah can cat cax cca ccc cce ccg cch ccn cct ccx ce- cea cec cee ceg ceh cen cet cex cga cgc cge cgg cgh cgn cgt ch- cha chc che chg chh chn cht chx cn- cna cnc cne cng cnh cnn cnt cnx cta ctc cte ctg cth ctn ctt ctx cxc cxh cxt cxx eaa eac eae eag eah ean eat eax ec- eca ecc ece ecg ech ecn ect ecx eea eec eee eeg een eet eex ega egc ege egg egh egn egt egx eha ehc ehe ehg ehh ehn eht en- ena enc ene eng enh enn ent eta etc ete etg eth etn ett etx ex- exa exc exe exh ext exx gaa gac gae gag gah gan gat gca gcc gce gcg gch gcn gct ge- gea gec gee geg geh gen get gex gga ggc ggg ggh ggn ggt gha ghc ghe ghg ghh ghn ght gna gnc gne gnn gnt gta gtc gte gtg gth gtn gtt gtx gxa gxt haa hac hae hag hah han hat hax hca hcc hce hcg hch hcn hct he- hea hec hee heg heh hen het hex hga hgc hge hgg hgh hgn hgt hha hhc hhe hhg hhh hhn hht hna hnc hne hng hnh hnn hnt hta htc hte htg hth htn htt htx hxc naa nac nae nag nah nan nat nax nca ncc nce ncg nch ncn nct ncx ne- nea nec nee neg neh nen net nex nga ngc nge ngg ngh ngn ngt nha nhc nhe nhg nhh nhn nht nna nnc nne nng nnh nnn nnt nta ntc nte ntg nth ntn ntt ntx nxc nxt t-x taa tac tae tag tah tan tat tax tca tcc tce tcg tch tcn tct tcx te- tea tec tee teg teh ten tet tex tga tgc tge tgg tgh tgn tgt th- tha thc the thg thh thn tht thx tna tnc tne tng tnh tnn tnt tnx tta ttc tte ttg tth ttn ttt ttx txe txn txt xaa xac xag xan xat xch xcx xee xeg xen xet xex xge xht xna xnc xtc xtx xxx