-er c-- ccc cce ccg ccm cco ccr ccv ce- cec cee ceg cem ceo cer cev cgc cge cgg cgm cgo cgr cgv cmc cme cmg cmm cmo cmr cmv co- coc coe cog com coo cor cov crc cre crg crm cro crr crv cvc cve cvg cvm cvo cvr cvv ec- ecc ece ecg ecm eco ecr ecv eec eee eeg eem eeo eer eev egc ege egg egm ego egr em- emc eme emg emm emo emr emv eo- eoc eoe eog eom eoo eor erc ere erg erm ero err erv evc eve evg evm evo evr evv gcc gce gcg gcm gco gcr ge- gec gee geg gem geo ger gev ggc ggg ggm ggo ggr ggv gmc gme gmg gmm gmo gmr gmv goc goe gog gom goo gor gov grc gre grg grm gro grr grv gvc gve gvg gvm gvo gvr m-o m-r m-v mc- mcc mce mcg mcm mco mcr mcv mec mee meg mem meo mer mev mgc mge mgm mgo mgr mgv mmc mme mmg mmm mmo mmr mmv moc moe mog mom moo mor mov mrc mre mrg mrm mro mrr mrv mvc mve mvg mvm mvo mvr mvv oc- occ ocg ocm oco ocr ocv oec oee oeg oem oeo oer ogc oge ogg ogo om- omc ome omg omm omo omr omv oo- ooc oog oom ooo oor oov or- orc ore org orm oro orr orv ov- ovc ove ovo ovv rcc rce rcg rcm rco rcr rcv re- rec ree reg rem reo rer rev rgc rge rgg rgo rgr rgv rmc rme rmg rmm rmo rmr rmv roc roe rog rom roo ror rov rrc rrg rrm rrr rvc rve rvg rvm rvo rvr rvv v-e vcc vce vcm vco vcr vec vee veg vem veo ver vgc vgg vgm vgo vgr vm- vmc vmm vmo vmr voc voe vog vom voo vor vov vrc vre vrg vrm vrr vvc vvg vvm vvo vvr vvv