-er a-a a-c a-t aaa aac aae aag aam aan aar aas aat ac- aca acc ace acg acm acn acr acs act aea aec aee aeg aem aen aer aes aet ag- aga agc age agg agm agn agr ags agt ama amc ame amg amm amn amr ams amt an- ana anc ane ang anm ann anr ans ant ar- ara arc are arg arm arn arr ars art as- asa asc ase asg asm asn asr ass ast at- ata atc ate atg atm atn atr ats att c-- caa cac cae cag cam can car cas cat cca ccc cce ccg ccm ccn ccr ccs cct ce- cea cec cee ceg cem cen cer ces cet cga cgc cge cgg cgm cgn cgr cgs cgt cma cmc cme cmg cmm cmn cmr cms cmt cn- cna cnc cne cng cnm cnn cnr cns cnt cra crc cre crg crm crn crr crs crt csa csc cse csg csm csn csr css cst cta ctc cte ctg ctm ctn ctr cts ctt eaa eac eae eag eam ean ear eas eat ec- eca ecc ece ecg ecm ecn ecr ecs ect eea eec eee eeg eem een eer ees eet ega egc ege egg egm egn egr egs egt em- ema emc eme emg emm emn emr ems emt en- ena enc ene eng enm enn enr ens ent era erc ere erg erm ern err ers ert es- esa esc ese esg esm esn esr ess est eta etc ete etg etm etn etr ets ett gaa gac gae gag gam gan gar gas gat gca gcc gce gcg gcm gcn gcr gcs gct ge- gea gec gee geg gem gen ger ges get gga ggc ggg ggm ggn ggr ggs ggt gma gmc gme gmg gmm gmn gmr gms gmt gna gnc gne gnm gnn gnr gns gnt gra grc gre grg grm grn grr grs grt gsa gsc gse gsg gsm gsn gsr gss gst gta gtc gte gtg gtm gtn gtr gts gtt m-r maa mac mae mag mam man mar mas mat mc- mca mcc mce mcg mcm mcn mcr mcs mct mea mec mee meg mem men mer mes met mga mgc mge mgm mgn mgr mgs mgt mma mmc mme mmg mmm mmn mmr mms mmt mna mnc mne mng mnm mnn mnr mns mnt mra mrc mre mrg mrm mrn mrr mrs mrt msa msc mse msg msm msn msr mss mst mta mtc mte mtg mtm mtn mtr mts mtt naa nac nae nag nam nan nar nas nat nca ncc nce ncg ncm ncn ncr ncs nct ne- nea nec nee neg nem nen ner nes net nga ngc nge ngg ngm ngn ngs ngt nma nmc nme nmg nmm nmn nmr nms nmt nna nnc nne nng nnm nnn nns nnt nra nrc nre nrg nrm nrn nrr nrs nrt nsa nsc nse nsg nsm nsn nsr nss nst nta ntc nte ntg ntm ntn ntr nts ntt ra- raa rac rae rag ram ran rar ras rat rca rcc rce rcg rcm rcn rcr rcs rct re- rea rec ree reg rem ren rer res ret rga rgc rge rgg rgn rgr rgs rgt rma rmc rme rmg rmm rmn rmr rms rmt rna rnc rng rnm rnn rnr rns rnt rra rrc rrg rrm rrn rrr rrs rrt rsa rsc rse rsg rsm rsn rsr rss rst rta rtc rte rtg rtm rtn rtr rts rtt saa sac sae sag sam san sar sas sat sca scc sce scg scm scn scr scs sct se- sea sec see seg sem sen ser ses set sga sgc sge sgg sgm sgn sgr sgs sgt sma smc sme smg smm smn smr sms smt sna snc sne sng snm snn snr sns snt sr- sra src sre srg srm srn srr srs srt ss- ssa ssc sse ssg ssm ssn ssr sss sst sta stc ste stg stm stn str sts stt taa tac tae tag tam tan tar tas tat tca tcc tce tcg tcm tcn tcr tcs tct te- tea tec tee teg tem ten ter tes tet tga tgc tge tgg tgm tgn tgr tgs tgt tma tmc tme tmg tmm tmn tmr tms tmt tna tnc tne tng tnm tnn tnr tns tnt tra trc tre trg trm trn trr trs trt tsa tsc tse tsg tsm tsn tsr tss tst tta ttc tte ttg ttm ttn ttr tts ttt