a-a a-c aaa aac aae aag aah aan aas aax ac- aca acc ace acg ach acn acs acx aea aec aee aeg aeh aen aes aex ag- aga agc age agg agh agn ags agx aha ahc ahe ahg ahh ahn ahs ahx an- ana anc ane ang anh ann ans anx as- asa asc ase asg ash asn ass asx ax- axa axe axh axn axs axx c-- caa cac cae cag cah can cas cax cca ccc cce ccg cch ccn ccs ccx ce- cea cec cee ceg ceh cen ces cex cga cgc cge cgg cgh cgn cgs ch- cha chc che chg chh chn chs chx cn- cna cnc cne cng cnh cnn cns cnx csa csc cse csg csh csn css csx cxc cxh cxs cxx eaa eac eae eag eah ean eas eax ec- eca ecc ece ecg ech ecn ecs ecx eea eec eee eeg een ees eex ega egc ege egg egh egn egs egx eha ehc ehe ehg ehh ehn ehs en- ena enc ene eng enh enn ens es- esa esc ese esg esh esn ess esx ex- exa exc exe exh exs exx gaa gac gae gag gah gan gas gca gcc gce gcg gch gcn gcs ge- gea gec gee geg geh gen ges gex gga ggc ggg ggh ggn ggs gha ghc ghe ghg ghh ghn ghs gna gnc gne gnn gns gsa gsc gse gsg gsn gss gsx gxa gxs haa hac hae hag hah han has hax hca hcc hce hcg hch hcn hcs he- hea hec hee heg heh hen hes hex hga hgc hge hgg hgh hgn hgs hha hhc hhe hhg hhh hhn hhs hna hnc hne hng hnh hnn hns hsa hsc hse hsg hsh hsn hss hsx hxc naa nac nae nag nah nan nas nax nca ncc nce ncg nch ncn ncs ncx ne- nea nec nee neg neh nen nes nex nga ngc nge ngg ngh ngn ngs nha nhc nhe nhg nhh nhn nhs nna nnc nne nng nnh nnn nns nsa nsc nse nsg nsh nsn nss nsx nxc saa sac sae sag sah san sas sax sca scc sce scg sch scn scs scx se- sea sec see seg seh sen ses sex sga sgc sge sgg sgh sgn sgs sgx sh- sha shc she shg shh shn shs sna snc sne sng snn sns ss- ssa ssc sse ssg ssh ssn sss ssx sxc sxn sxs xaa xac xag xan xas xch xcx xee xeg xen xes xex xge xna xnc xns xsa xsc xss xxx