-er a-a a-c aaa aac aad aae aag aar aas aau ac- aca acc acd ace acg acr acs acu ad- ada adc add ade adg adr ads adu aea aec aed aee aeg aer aes aeu ag- aga agc agd age agg agr ags agu ar- ara arc ard are arg arr ars aru as- asa asc asd ase asg asr ass asu au- aua auc aud aue aug aur aus c-- caa cac cad cae cag car cas cau cca ccc ccd cce ccg ccr ccs ccu cda cdc cdd cde cdg cdr cds cdu ce- cea cec ced cee ceg cer ces ceu cga cgc cgd cge cgg cgr cgs cgu cra crc crd cre crg crr crs cru csa csc csd cse csg csr css csu cua cuc cud cue cug cur cus cuu daa dac dad dae dag dar das dau dca dcc dcd dce dcg dcr dcs dcu dda ddc ddd dde ddg ddr dds ddu de- dea dec ded dee deg der des deu dga dgc dgd dge dgg dgr dgs dgu dra drc drd dre drg drr drs dru dsa dsc dsd dse dsg dsr dss dsu dua duc dud due dug dur dus eaa eac ead eae eag ear eas eau ec- eca ecc ecd ece ecg ecr ecs ecu ed- eda edc edd ede edg edr eds edu eea eec eed eee eeg eer ees ega egc egd ege egg egr egs egu era erc erd ere erg err ers eru es- esa esc esd ese esg esr ess esu eu- eua euc eud eue eug eur eus g-d gaa gac gad gae gag gar gas gau gca gcc gcd gce gcg gcr gcs gcu gda gdc gdd gde gdr gds gdu ge- gea gec ged gee geg ger ges geu gga ggc ggd ggg ggr ggs ggu gra grc grd gre grg grr grs gru gsa gsc gsd gse gsg gsr gss gsu gu- gua guc gud gue gug gur gus guu ra- raa rac rad rae rag rar ras rau rca rcc rcd rce rcg rcr rcs rcu rda rdc rdd rde rdg rdr rds rdu re- rea rec red ree reg rer res reu rga rgc rgd rge rgg rgr rgs rra rrc rrd rrg rrr rrs rru rsa rsc rsd rse rsg rsr rss rsu rua ruc rud rue rug rur rus ruu saa sac sad sae sag sar sas sau sca scc scd sce scg scr scs scu sda sdc sdd sde sdg sdr sds sdu se- sea sec sed see seg ser ses seu sga sgc sgd sge sgg sgr sgs sgu sr- sra src srd sre srg srr srs ss- ssa ssc ssd sse ssg ssr sss ssu sua suc sud sue sug sur sus suu ua- uaa uac uad uae uag uar uas uau uca ucc ucd uce ucg ucr ucs ucu uda udc udd ude udg udr uds udu uea uec ued uee ueg uer ues uga ugc uge ugg ugr ugs ugu ur- ura urc urd ure urg urr urs uru usa usc usd use usg usr uss usu uua uuc uue uug uur uus uuu