-er a-a a-c aaa aac aae aag aah aan aar aas aax ac- aca acc ace acg ach acn acr acs acx aea aec aee aeg aeh aen aer aes aex ag- aga agc age agg agh agn agr ags agx aha ahc ahe ahg ahh ahn ahr ahs ahx an- ana anc ane ang anh ann anr ans anx ar- ara arc are arg arh arn arr ars arx as- asa asc ase asg ash asn asr ass asx ax- axa axe axh axn axr axs axx c-- caa cac cae cag cah can car cas cax cca ccc cce ccg cch ccn ccr ccs ccx ce- cea cec cee ceg ceh cen cer ces cex cga cgc cge cgg cgh cgn cgr cgs ch- cha chc che chg chh chn chr chs chx cn- cna cnc cne cng cnh cnn cnr cns cnx cra crc cre crg crh crn crr crs crx csa csc cse csg csh csn csr css csx cxc cxh cxr cxs cxx eaa eac eae eag eah ean ear eas eax ec- eca ecc ece ecg ech ecn ecr ecs ecx eea eec eee eeg een eer ees eex ega egc ege egg egh egn egr egs egx eha ehc ehe ehg ehh ehn ehr ehs en- ena enc ene eng enh enn enr ens era erc ere erg erh ern err ers es- esa esc ese esg esh esn esr ess esx ex- exa exc exe exh exr exs exx gaa gac gae gag gah gan gar gas gca gcc gce gcg gch gcn gcr gcs ge- gea gec gee geg geh gen ger ges gex gga ggc ggg ggh ggn ggr ggs gha ghc ghe ghg ghh ghn ghr ghs gna gnc gne gnn gnr gns gra grc gre grg grh grn grr grs grx gsa gsc gse gsg gsn gsr gss gsx gxa gxs haa hac hae hag hah han har has hax hca hcc hce hcg hch hcn hcr hcs he- hea hec hee heg heh hen her hes hex hga hgc hge hgg hgh hgn hgr hgs hha hhc hhe hhg hhh hhn hhr hhs hna hnc hne hng hnh hnn hns hr- hra hrc hre hrg hrh hrn hrr hrs hsa hsc hse hsg hsh hsn hsr hss hsx hxc naa nac nae nag nah nan nar nas nax nca ncc nce ncg nch ncn ncr ncs ncx ne- nea nec nee neg neh nen ner nes nex nga ngc nge ngg ngh ngn ngs nha nhc nhe nhg nhh nhn nhr nhs nna nnc nne nng nnh nnn nns nra nrc nre nrg nrn nrr nrs nrx nsa nsc nse nsg nsh nsn nsr nss nsx nxc ra- raa rac rae rag rah ran rar ras rax rca rcc rce rcg rch rcn rcr rcs rcx re- rea rec ree reg reh ren rer res rex rga rgc rge rgg rgh rgn rgr rgs rgx rh- rha rhc rhe rhg rhh rhn rhr rhs rna rnc rng rnh rnn rnr rns rra rrc rrg rrh rrn rrr rrs rsa rsc rse rsg rsh rsn rsr rss rsx rxr rxs saa sac sae sag sah san sar sas sax sca scc sce scg sch scn scr scs scx se- sea sec see seg seh sen ser ses sex sga sgc sge sgg sgh sgn sgr sgs sgx sh- sha shc she shg shh shn shr shs sna snc sne sng snn snr sns sr- sra src sre srg srh srn srr srs srx ss- ssa ssc sse ssg ssh ssn ssr sss ssx sxc sxn sxs xaa xac xag xan xar xas xch xcr xcx xee xeg xen xer xes xex xge xna xnc xns xrc xrx xsa xsc xss xxx