-er a-a a-c aaa aac aad aae aag aan aar aau ac- aca acc acd ace acg acn acr acu ad- ada adc add ade adg adn adr adu aea aec aed aee aeg aen aer aeu ag- aga agc agd age agg agn agr agu an- ana anc and ane ang ann anr anu ar- ara arc ard are arg arn arr aru au- aua auc aud aue aug aun aur c-- caa cac cad cae cag can car cau cca ccc ccd cce ccg ccn ccr ccu cda cdc cdd cde cdg cdn cdr cdu ce- cea cec ced cee ceg cen cer ceu cga cgc cgd cge cgg cgn cgr cgu cn- cna cnc cnd cne cng cnn cnr cnu cra crc crd cre crg crn crr cru cua cuc cud cue cug cun cur cuu daa dac dad dae dag dan dar dau dca dcc dcd dce dcg dcn dcr dcu dda ddc ddd dde ddg ddn ddr ddu de- dea dec ded dee deg den der deu dga dgc dgd dge dgg dgn dgr dgu dna dnc dnd dne dng dnn dnr dra drc drd dre drg drn drr dru dua duc dud due dug dun dur eaa eac ead eae eag ean ear eau ec- eca ecc ecd ece ecg ecn ecr ecu ed- eda edc edd ede edg edn edr edu eea eec eed eee eeg een eer ega egc egd ege egg egn egr egu en- ena enc end ene eng enn enr enu era erc erd ere erg ern err eru eu- eua euc eud eue eug eun eur g-d gaa gac gad gae gag gan gar gau gca gcc gcd gce gcg gcn gcr gcu gda gdc gdd gde gdn gdr gdu ge- gea gec ged gee geg gen ger geu gga ggc ggd ggg ggn ggr ggu gna gnc gnd gne gnn gnr gnu gra grc grd gre grg grn grr gru gu- gua guc gud gue gug gun gur guu naa nac nad nae nag nan nar nau nca ncc ncd nce ncg ncn ncr ncu nda ndc ndd nde ndg ndn ndr ndu ne- nea nec ned nee neg nen ner neu nga ngc ngd nge ngg ngn ngu nna nnc nne nng nnn nnu nra nrc nrd nre nrg nrn nrr nru nua nuc nud nue nug nun nur nuu ra- raa rac rad rae rag ran rar rau rca rcc rcd rce rcg rcn rcr rcu rda rdc rdd rde rdg rdn rdr rdu re- rea rec red ree reg ren rer reu rga rgc rgd rge rgg rgn rgr rna rnc rnd rng rnn rnr rnu rra rrc rrd rrg rrn rrr rru rua ruc rud rue rug run rur ruu ua- uaa uac uad uae uag uan uar uau uca ucc ucd uce ucg ucn ucr ucu uda udc udd ude udg udn udr udu uea uec ued uee ueg uen uer uga ugc uge ugg ugn ugr ugu un- una unc und une ung unn unr unu ur- ura urc urd ure urg urn urr uru uua uuc uue uug uun uur uuu