-er c-- ccc cce ccg ccm ccn ccr ce- cec cee ceg cem cen cer cgc cge cgg cgm cgn cgr cmc cme cmg cmm cmn cmr cn- cnc cne cng cnm cnn cnr crc cre crg crm crn crr ec- ecc ece ecg ecm ecn ecr eec eee eeg eem een eer egc ege egg egm egn egr em- emc eme emg emm emn emr en- enc ene eng enm enn enr erc ere erg erm ern err gcc gce gcg gcm gcn gcr ge- gec gee geg gem gen ger ggc ggg ggm ggn ggr gmc gme gmg gmm gmn gmr gnc gne gnm gnn gnr grc gre grg grm grn grr m-r mc- mcc mce mcg mcm mcn mcr mec mee meg mem men mer mgc mge mgm mgn mgr mmc mme mmg mmm mmn mmr mnc mne mng mnm mnn mnr mrc mre mrg mrm mrn mrr ncc nce ncg ncm ncn ncr ne- nec nee neg nem nen ner ngc nge ngg ngm ngn nmc nme nmg nmm nmn nmr nnc nne nng nnm nnn nrc nre nrg nrm nrn nrr rcc rce rcg rcm rcn rcr re- rec ree reg rem ren rer rgc rge rgg rgn rgr rmc rme rmg rmm rmn rmr rnc rng rnm rnn rnr rrc rrg rrm rrn rrr