-er a-a a-c aaa aac aad aae aag aah aar ac- aca acc acd ace acg ach acr ad- ada adc add ade adg adh adr aea aec aed aee aeg aeh aer ag- aga agc agd age agg agh agr aha ahc ahd ahe ahg ahh ahr ar- ara arc ard are arg arh arr c-- caa cac cad cae cag cah car cca ccc ccd cce ccg cch ccr cda cdc cdd cde cdg cdh cdr ce- cea cec ced cee ceg ceh cer cga cgc cgd cge cgg cgh cgr ch- cha chc chd che chg chh chr cra crc crd cre crg crh crr daa dac dad dae dag dah dar dca dcc dcd dce dcg dcr dda ddc ddd dde ddg ddh ddr de- dea dec ded dee deg deh der dga dgc dgd dge dgg dgh dgr dh- dha dhc dhd dhe dhh dhr dra drc drd dre drg drr eaa eac ead eae eag eah ear ec- eca ecc ecd ece ecg ech ecr ed- eda edc edd ede edg edh edr eea eec eed eee eeg eer ega egc egd ege egg egh egr eha ehc ehd ehe ehg ehh ehr era erc erd ere erg erh err g-d gaa gac gad gae gag gah gar gca gcc gcd gce gcg gch gcr gda gdc gdd gde gdh gdr ge- gea gec ged gee geg geh ger gga ggc ggd ggg ggh ggr gha ghc ghd ghe ghg ghh ghr gra grc grd gre grg grh grr haa hac had hae hag hah har hca hcc hcd hce hcg hch hcr hda hdc hdd hde hdg hdh hdr he- hea hec hed hee heg heh her hga hgc hge hgg hgh hgr hha hhc hhd hhe hhg hhh hhr hr- hra hrc hrd hre hrg hrh hrr ra- raa rac rad rae rag rah rar rca rcc rcd rce rcg rch rcr rda rdc rdd rde rdg rdh rdr re- rea rec red ree reg reh rer rga rgc rgd rge rgg rgh rgr rh- rha rhc rhd rhe rhg rhh rhr rra rrc rrd rrg rrh rrr