-er a-a a-c aaa aac aad aae aag aam aan aar ac- aca acc acd ace acg acm acn acr ad- ada adc add ade adg adm adn adr aea aec aed aee aeg aem aen aer ag- aga agc agd age agg agm agn agr ama amc amd ame amg amm amn amr an- ana anc and ane ang anm ann anr ar- ara arc ard are arg arm arn arr c-- caa cac cad cae cag cam can car cca ccc ccd cce ccg ccm ccn ccr cda cdc cdd cde cdg cdm cdn cdr ce- cea cec ced cee ceg cem cen cer cga cgc cgd cge cgg cgm cgn cgr cma cmc cmd cme cmg cmm cmn cmr cn- cna cnc cnd cne cng cnm cnn cnr cra crc crd cre crg crm crn crr daa dac dad dae dag dam dan dar dca dcc dcd dce dcg dcm dcn dcr dda ddc ddd dde ddg ddm ddn ddr de- dea dec ded dee deg dem den der dga dgc dgd dge dgg dgm dgn dgr dma dmc dmd dme dmg dmm dmn dmr dna dnc dnd dne dng dnm dnn dnr dra drc drd dre drg drm drn drr eaa eac ead eae eag eam ean ear ec- eca ecc ecd ece ecg ecm ecn ecr ed- eda edc edd ede edg edm edn edr eea eec eed eee eeg eem een eer ega egc egd ege egg egm egn egr em- ema emc emd eme emg emm emn emr en- ena enc end ene eng enm enn enr era erc erd ere erg erm ern err g-d gaa gac gad gae gag gam gan gar gca gcc gcd gce gcg gcm gcn gcr gda gdc gdd gde gdm gdn gdr ge- gea gec ged gee geg gem gen ger gga ggc ggd ggg ggm ggn ggr gma gmc gmd gme gmg gmm gmn gmr gna gnc gnd gne gnm gnn gnr gra grc grd gre grg grm grn grr m-r maa mac mad mae mag mam man mar mc- mca mcc mcd mce mcg mcm mcn mcr mda mdc mdd mde mdg mdm mdn mdr mea mec med mee meg mem men mer mga mgc mgd mge mgm mgn mgr mma mmc mmd mme mmg mmm mmn mmr mna mnc mne mng mnm mnn mnr mra mrc mrd mre mrg mrm mrn mrr naa nac nad nae nag nam nan nar nca ncc ncd nce ncg ncm ncn ncr nda ndc ndd nde ndg ndm ndn ndr ne- nea nec ned nee neg nem nen ner nga ngc ngd nge ngg ngm ngn nma nmc nmd nme nmg nmm nmn nmr nna nnc nne nng nnm nnn nra nrc nrd nre nrg nrm nrn nrr ra- raa rac rad rae rag ram ran rar rca rcc rcd rce rcg rcm rcn rcr rda rdc rdd rde rdg rdm rdn rdr re- rea rec red ree reg rem ren rer rga rgc rgd rge rgg rgn rgr rma rmc rmd rme rmg rmm rmn rmr rna rnc rnd rng rnm rnn rnr rra rrc rrd rrg rrm rrn rrr