-er a-a a-c aaa aac aae aag aan aar aas aau ac- aca acc ace acg acn acr acs acu aea aec aee aeg aen aer aes aeu ag- aga agc age agg agn agr ags agu an- ana anc ane ang ann anr ans anu ar- ara arc are arg arn arr ars aru as- asa asc ase asg asn asr ass asu au- aua auc aue aug aun aur aus c-- caa cac cae cag can car cas cau cca ccc cce ccg ccn ccr ccs ccu ce- cea cec cee ceg cen cer ces ceu cga cgc cge cgg cgn cgr cgs cgu cn- cna cnc cne cng cnn cnr cns cnu cra crc cre crg crn crr crs cru csa csc cse csg csn csr css csu cua cuc cue cug cun cur cus cuu eaa eac eae eag ean ear eas eau ec- eca ecc ece ecg ecn ecr ecs ecu eea eec eee eeg een eer ees ega egc ege egg egn egr egs egu en- ena enc ene eng enn enr ens enu era erc ere erg ern err ers eru es- esa esc ese esg esn esr ess esu eu- eua euc eue eug eun eur eus gaa gac gae gag gan gar gas gau gca gcc gce gcg gcn gcr gcs gcu ge- gea gec gee geg gen ger ges geu gga ggc ggg ggn ggr ggs ggu gna gnc gne gnn gnr gns gnu gra grc gre grg grn grr grs gru gsa gsc gse gsg gsn gsr gss gsu gu- gua guc gue gug gun gur gus guu naa nac nae nag nan nar nas nau nca ncc nce ncg ncn ncr ncs ncu ne- nea nec nee neg nen ner nes neu nga ngc nge ngg ngn ngs ngu nna nnc nne nng nnn nns nnu nra nrc nre nrg nrn nrr nrs nru nsa nsc nse nsg nsn nsr nss nsu nua nuc nue nug nun nur nus nuu ra- raa rac rae rag ran rar ras rau rca rcc rce rcg rcn rcr rcs rcu re- rea rec ree reg ren rer res reu rga rgc rge rgg rgn rgr rgs rna rnc rng rnn rnr rns rnu rra rrc rrg rrn rrr rrs rru rsa rsc rse rsg rsn rsr rss rsu rua ruc rue rug run rur rus ruu saa sac sae sag san sar sas sau sca scc sce scg scn scr scs scu se- sea sec see seg sen ser ses seu sga sgc sge sgg sgn sgr sgs sgu sna snc sne sng snn snr sns snu sr- sra src sre srg srn srr srs ss- ssa ssc sse ssg ssn ssr sss ssu sua suc sue sug sun sur sus suu ua- uaa uac uae uag uan uar uas uau uca ucc uce ucg ucn ucr ucs ucu uea uec uee ueg uen uer ues uga ugc uge ugg ugn ugr ugs ugu un- una unc une ung unn unr uns unu ur- ura urc ure urg urn urr urs uru usa usc use usg usn usr uss usu uua uuc uue uug uun uur uus uuu