-er c-- ccc cce ccg ccn ccr ce- cec cee ceg cen cer cgc cge cgg cgn cgr cn- cnc cne cng cnn cnr crc cre crg crn crr ec- ecc ece ecg ecn ecr eec eee eeg een eer egc ege egg egn egr en- enc ene eng enn enr erc ere erg ern err gcc gce gcg gcn gcr ge- gec gee geg gen ger ggc ggg ggn ggr gnc gne gnn gnr grc gre grg grn grr ncc nce ncg ncn ncr ne- nec nee neg nen ner ngc nge ngg ngn nnc nne nng nnn nrc nre nrg nrn nrr rcc rce rcg rcn rcr re- rec ree reg ren rer rgc rge rgg rgn rgr rnc rng rnn rnr rrc rrg rrn rrr