-er a-a a-c aaa aac aae aag aam aan aar aas ac- aca acc ace acg acm acn acr acs aea aec aee aeg aem aen aer aes ag- aga agc age agg agm agn agr ags ama amc ame amg amm amn amr ams an- ana anc ane ang anm ann anr ans ar- ara arc are arg arm arn arr ars as- asa asc ase asg asm asn asr ass c-- caa cac cae cag cam can car cas cca ccc cce ccg ccm ccn ccr ccs ce- cea cec cee ceg cem cen cer ces cga cgc cge cgg cgm cgn cgr cgs cma cmc cme cmg cmm cmn cmr cms cn- cna cnc cne cng cnm cnn cnr cns cra crc cre crg crm crn crr crs csa csc cse csg csm csn csr css eaa eac eae eag eam ean ear eas ec- eca ecc ece ecg ecm ecn ecr ecs eea eec eee eeg eem een eer ees ega egc ege egg egm egn egr egs em- ema emc eme emg emm emn emr ems en- ena enc ene eng enm enn enr ens era erc ere erg erm ern err ers es- esa esc ese esg esm esn esr ess gaa gac gae gag gam gan gar gas gca gcc gce gcg gcm gcn gcr gcs ge- gea gec gee geg gem gen ger ges gga ggc ggg ggm ggn ggr ggs gma gmc gme gmg gmm gmn gmr gms gna gnc gne gnm gnn gnr gns gra grc gre grg grm grn grr grs gsa gsc gse gsg gsm gsn gsr gss m-r maa mac mae mag mam man mar mas mc- mca mcc mce mcg mcm mcn mcr mcs mea mec mee meg mem men mer mes mga mgc mge mgm mgn mgr mgs mma mmc mme mmg mmm mmn mmr mms mna mnc mne mng mnm mnn mnr mns mra mrc mre mrg mrm mrn mrr mrs msa msc mse msg msm msn msr mss naa nac nae nag nam nan nar nas nca ncc nce ncg ncm ncn ncr ncs ne- nea nec nee neg nem nen ner nes nga ngc nge ngg ngm ngn ngs nma nmc nme nmg nmm nmn nmr nms nna nnc nne nng nnm nnn nns nra nrc nre nrg nrm nrn nrr nrs nsa nsc nse nsg nsm nsn nsr nss ra- raa rac rae rag ram ran rar ras rca rcc rce rcg rcm rcn rcr rcs re- rea rec ree reg rem ren rer res rga rgc rge rgg rgn rgr rgs rma rmc rme rmg rmm rmn rmr rms rna rnc rng rnm rnn rnr rns rra rrc rrg rrm rrn rrr rrs rsa rsc rse rsg rsm rsn rsr rss saa sac sae sag sam san sar sas sca scc sce scg scm scn scr scs se- sea sec see seg sem sen ser ses sga sgc sge sgg sgm sgn sgr sgs sma smc sme smg smm smn smr sms sna snc sne sng snm snn snr sns sr- sra src sre srg srm srn srr srs ss- ssa ssc sse ssg ssm ssn ssr sss