-er a-a a-c aaa aac aad aae aag aar aau ac- aca acc acd ace acg acr acu ad- ada adc add ade adg adr adu aea aec aed aee aeg aer aeu ag- aga agc agd age agg agr agu ar- ara arc ard are arg arr aru au- aua auc aud aue aug aur c-- caa cac cad cae cag car cau cca ccc ccd cce ccg ccr ccu cda cdc cdd cde cdg cdr cdu ce- cea cec ced cee ceg cer ceu cga cgc cgd cge cgg cgr cgu cra crc crd cre crg crr cru cua cuc cud cue cug cur cuu daa dac dad dae dag dar dau dca dcc dcd dce dcg dcr dcu dda ddc ddd dde ddg ddr ddu de- dea dec ded dee deg der deu dga dgc dgd dge dgg dgr dgu dra drc drd dre drg drr dru dua duc dud due dug dur eaa eac ead eae eag ear eau ec- eca ecc ecd ece ecg ecr ecu ed- eda edc edd ede edg edr edu eea eec eed eee eeg eer ega egc egd ege egg egr egu era erc erd ere erg err eru eu- eua euc eud eue eug eur g-d gaa gac gad gae gag gar gau gca gcc gcd gce gcg gcr gcu gda gdc gdd gde gdr gdu ge- gea gec ged gee geg ger geu gga ggc ggd ggg ggr ggu gra grc grd gre grg grr gru gu- gua guc gud gue gug gur guu ra- raa rac rad rae rag rar rau rca rcc rcd rce rcg rcr rcu rda rdc rdd rde rdg rdr rdu re- rea rec red ree reg rer reu rga rgc rgd rge rgg rgr rra rrc rrd rrg rrr rru rua ruc rud rue rug rur ruu ua- uaa uac uad uae uag uar uau uca ucc ucd uce ucg ucr ucu uda udc udd ude udg udr udu uea uec ued uee ueg uer uga ugc uge ugg ugr ugu ur- ura urc urd ure urg urr uru uua uuc uue uug uur uuu