-er c-- ccc cce ccg ccm ccr ce- cec cee ceg cem cer cgc cge cgg cgm cgr cmc cme cmg cmm cmr crc cre crg crm crr ec- ecc ece ecg ecm ecr eec eee eeg eem eer egc ege egg egm egr em- emc eme emg emm emr erc ere erg erm err gcc gce gcg gcm gcr ge- gec gee geg gem ger ggc ggg ggm ggr gmc gme gmg gmm gmr grc gre grg grm grr m-r mc- mcc mce mcg mcm mcr mec mee meg mem mer mgc mge mgm mgr mmc mme mmg mmm mmr mrc mre mrg mrm mrr rcc rce rcg rcm rcr re- rec ree reg rem rer rgc rge rgg rgr rmc rme rmg rmm rmr rrc rrg rrm rrr