-er a-a a-c aaa aac aae aag aan aar aas aav ac- aca acc ace acg acn acr acs acv aea aec aee aeg aen aer aes aev ag- aga agc age agg agn agr ags agv an- ana anc ane ang ann anr ans anv ar- ara arc are arg arn arr ars arv as- asa asc ase asg asn asr ass asv av- ava avc ave avg avn avr avs c-- caa cac cae cag can car cas cav cca ccc cce ccg ccn ccr ccs ccv ce- cea cec cee ceg cen cer ces cev cga cgc cge cgg cgn cgr cgs cgv cn- cna cnc cne cng cnn cnr cns cnv cra crc cre crg crn crr crs crv csa csc cse csg csn csr css csv cva cvc cve cvg cvn cvr cvs cvv eaa eac eae eag ean ear eas eav ec- eca ecc ece ecg ecn ecr ecs ecv eea eec eee eeg een eer ees eev ega egc ege egg egn egr egs en- ena enc ene eng enn enr ens env era erc ere erg ern err ers erv es- esa esc ese esg esn esr ess esv eva evc eve evg evn evr evs evv gaa gac gae gag gan gar gas gav gca gcc gce gcg gcn gcr gcs ge- gea gec gee geg gen ger ges gev gga ggc ggg ggn ggr ggs ggv gna gnc gne gnn gnr gns gnv gra grc gre grg grn grr grs grv gsa gsc gse gsg gsn gsr gss gsv gva gvc gve gvg gvn gvr gvs naa nac nae nag nan nar nas nav nca ncc nce ncg ncn ncr ncs ncv ne- nea nec nee neg nen ner nes nev nga ngc nge ngg ngn ngs nna nnc nne nng nnn nns nnv nra nrc nre nrg nrn nrr nrs nrv nsa nsc nse nsg nsn nsr nss nsv nva nvc nve nvg nvn nvv ra- raa rac rae rag ran rar ras rav rca rcc rce rcg rcn rcr rcs rcv re- rea rec ree reg ren rer res rev rga rgc rge rgg rgn rgr rgs rgv rna rnc rng rnn rnr rns rnv rra rrc rrg rrn rrr rrs rsa rsc rse rsg rsn rsr rss rsv rva rvc rve rvg rvn rvr rvs rvv saa sac sae sag san sar sas sav sca scc sce scg scn scr scs scv se- sea sec see seg sen ser ses sev sga sgc sge sgg sgn sgr sgs sgv sna snc sne sng snn snr sns snv sr- sra src sre srg srn srr srs srv ss- ssa ssc sse ssg ssn ssr sss ssv sva svc sve svg svn svr svs svv v-a v-e vaa vac vae vag van var vas vav vca vcc vce vcn vcr vcs vea vec vee veg ven ver ves vga vgc vgg vgn vgr vgs vn- vna vng vnr vns vnv vra vrc vre vrg vrn vrr vrs vsa vsc vse vsg vsn vsr vss vsv vva vvc vvg vvr vvs vvv