-er c-- ccc ccd cce ccg ccn ccr cdc cdd cde cdg cdn cdr ce- cec ced cee ceg cen cer cgc cgd cge cgg cgn cgr cn- cnc cnd cne cng cnn cnr crc crd cre crg crn crr dcc dcd dce dcg dcn dcr ddc ddd dde ddg ddn ddr de- dec ded dee deg den der dgc dgd dge dgg dgn dgr dnc dnd dne dng dnn dnr drc drd dre drg drn drr ec- ecc ecd ece ecg ecn ecr ed- edc edd ede edg edn edr eec eed eee eeg een eer egc egd ege egg egn egr en- enc end ene eng enn enr erc erd ere erg ern err g-d gcc gcd gce gcg gcn gcr gdc gdd gde gdn gdr ge- gec ged gee geg gen ger ggc ggd ggg ggn ggr gnc gnd gne gnn gnr grc grd gre grg grn grr ncc ncd nce ncg ncn ncr ndc ndd nde ndg ndn ndr ne- nec ned nee neg nen ner ngc ngd nge ngg ngn nnc nne nng nnn nrc nrd nre nrg nrn nrr rcc rcd rce rcg rcn rcr rdc rdd rde rdg rdn rdr re- rec red ree reg ren rer rgc rgd rge rgg rgn rgr rnc rnd rng rnn rnr rrc rrd rrg rrn rrr