-er a-a a-c aaa aac aad aae aag aam aar ac- aca acc acd ace acg acm acr ad- ada adc add ade adg adm adr aea aec aed aee aeg aem aer ag- aga agc agd age agg agm agr ama amc amd ame amg amm amr ar- ara arc ard are arg arm arr c-- caa cac cad cae cag cam car cca ccc ccd cce ccg ccm ccr cda cdc cdd cde cdg cdm cdr ce- cea cec ced cee ceg cem cer cga cgc cgd cge cgg cgm cgr cma cmc cmd cme cmg cmm cmr cra crc crd cre crg crm crr daa dac dad dae dag dam dar dca dcc dcd dce dcg dcm dcr dda ddc ddd dde ddg ddm ddr de- dea dec ded dee deg dem der dga dgc dgd dge dgg dgm dgr dma dmc dmd dme dmg dmm dmr dra drc drd dre drg drm drr eaa eac ead eae eag eam ear ec- eca ecc ecd ece ecg ecm ecr ed- eda edc edd ede edg edm edr eea eec eed eee eeg eem eer ega egc egd ege egg egm egr em- ema emc emd eme emg emm emr era erc erd ere erg erm err g-d gaa gac gad gae gag gam gar gca gcc gcd gce gcg gcm gcr gda gdc gdd gde gdm gdr ge- gea gec ged gee geg gem ger gga ggc ggd ggg ggm ggr gma gmc gmd gme gmg gmm gmr gra grc grd gre grg grm grr m-r maa mac mad mae mag mam mar mc- mca mcc mcd mce mcg mcm mcr mda mdc mdd mde mdg mdm mdr mea mec med mee meg mem mer mga mgc mgd mge mgm mgr mma mmc mmd mme mmg mmm mmr mra mrc mrd mre mrg mrm mrr ra- raa rac rad rae rag ram rar rca rcc rcd rce rcg rcm rcr rda rdc rdd rde rdg rdm rdr re- rea rec red ree reg rem rer rga rgc rgd rge rgg rgr rma rmc rmd rme rmg rmm rmr rra rrc rrd rrg rrm rrr