-er -th a-a a-c a-t aaa aac aae aag aah aan aar aas aat aax ac- aca acc ace acg ach acn acr acs act acx aea aec aee aeg aeh aen aer aes aet aex ag- aga agc age agg agh agn agr ags agt agx aha ahc ahe ahg ahh ahn ahr ahs aht ahx an- ana anc ane ang anh ann anr ans ant anx ar- ara arc are arg arh arn arr ars art arx as- asa asc ase asg ash asn asr ass ast asx at- ata atc ate atg ath atn atr ats att atx ax- axa axe axh axn axr axs axt axx c-- caa cac cae cag cah can car cas cat cax cca ccc cce ccg cch ccn ccr ccs cct ccx ce- cea cec cee ceg ceh cen cer ces cet cex cga cgc cge cgg cgh cgn cgr cgs cgt ch- cha chc che chg chh chn chr chs cht chx cn- cna cnc cne cng cnh cnn cnr cns cnt cnx cra crc cre crg crh crn crr crs crt crx csa csc cse csg csh csn csr css cst csx cta ctc cte ctg cth ctn ctr cts ctt ctx cxc cxh cxr cxs cxt cxx eaa eac eae eag eah ean ear eas eat eax ec- eca ecc ece ecg ech ecn ecr ecs ect ecx eea eec eee eeg een eer ees eet eex ega egc ege egg egh egn egr egs egt egx eha ehc ehe ehg ehh ehn ehr ehs eht en- ena enc ene eng enh enn enr ens ent era erc ere erg erh ern err ers ert es- esa esc ese esg esh esn esr ess est esx eta etc ete etg eth etn etr ets ett etx ex- exa exc exe exh exr exs ext exx gaa gac gae gag gah gan gar gas gat gca gcc gce gcg gch gcn gcr gcs gct ge- gea gec gee geg geh gen ger ges get gex gga ggc ggg ggh ggn ggr ggs ggt gha ghc ghe ghg ghh ghn ghr ghs ght gna gnc gne gnn gnr gns gnt gra grc gre grg grh grn grr grs grt grx gsa gsc gse gsg gsn gsr gss gst gsx gta gtc gte gtg gth gtn gtr gts gtt gtx gxa gxs gxt haa hac hae hag hah han har has hat hax hca hcc hce hcg hch hcn hcr hcs hct he- hea hec hee heg heh hen her hes het hex hga hgc hge hgg hgh hgn hgr hgs hgt hha hhc hhe hhg hhh hhn hhr hhs hht hna hnc hne hng hnh hnn hns hnt hr- hra hrc hre hrg hrh hrn hrr hrs hrt hsa hsc hse hsg hsh hsn hsr hss hst hsx hta htc hte htg hth htn htr hts htt htx hxc naa nac nae nag nah nan nar nas nat nax nca ncc nce ncg nch ncn ncr ncs nct ncx ne- nea nec nee neg neh nen ner nes net nex nga ngc nge ngg ngh ngn ngs ngt nha nhc nhe nhg nhh nhn nhr nhs nht nna nnc nne nng nnh nnn nns nnt nra nrc nre nrg nrn nrr nrs nrt nrx nsa nsc nse nsg nsh nsn nsr nss nst nsx nta ntc nte ntg nth ntn ntr nts ntt ntx nxc nxt ra- raa rac rae rag rah ran rar ras rat rax rca rcc rce rcg rch rcn rcr rcs rct rcx re- rea rec ree reg reh ren rer res ret rex rga rgc rge rgg rgh rgn rgr rgs rgt rgx rh- rha rhc rhe rhg rhh rhn rhr rhs rht rna rnc rng rnh rnn rnr rns rnt rra rrc rrg rrh rrn rrr rrs rrt rsa rsc rse rsg rsh rsn rsr rss rst rsx rta rtc rte rtg rtn rtr rts rtt rtx rxr rxs saa sac sae sag sah san sar sas sat sax sca scc sce scg sch scn scr scs sct scx se- sea sec see seg seh sen ser ses set sex sga sgc sge sgg sgh sgn sgr sgs sgt sgx sh- sha shc she shg shh shn shr shs sht sna snc sne sng snn snr sns snt sr- sra src sre srg srh srn srr srs srt srx ss- ssa ssc sse ssg ssh ssn ssr sss sst ssx sta stc ste stg sth stn str sts stt stx sxc sxn sxs sxt t-x taa tac tae tag tah tan tar tas tat tax tca tcc tce tcg tch tcn tcr tcs tct tcx te- tea tec tee teg teh ten ter tes tet tex tga tgc tge tgg tgh tgn tgr tgs tgt th- tha thc the thg thh thn thr ths tht thx tna tnc tne tng tnh tnn tnr tns tnt tnx tra trc tre trg trh trn trr trs trt trx tsa tsc tse tsg tsh tsn tsr tss tst tsx tta ttc tte ttg tth ttn ttr tts ttt ttx txe txn txs txt xaa xac xag xan xar xas xat xch xcr xcx xee xeg xen xer xes xet xex xge xht xna xnc xns xrc xrt xrx xsa xsc xss xst xtc xtr xts xtx xxx