-er c-- ccc cce ccg ccn cco ccr ccv ce- cec cee ceg cen ceo cer cev cgc cge cgg cgn cgo cgr cgv cn- cnc cne cng cnn cno cnr cnv co- coc coe cog con coo cor cov crc cre crg crn cro crr crv cvc cve cvg cvn cvo cvr cvv ec- ecc ece ecg ecn eco ecr ecv eec eee eeg een eeo eer eev egc ege egg egn ego egr en- enc ene eng enn eno enr env eo- eoc eoe eog eon eoo eor erc ere erg ern ero err erv evc eve evg evn evo evr evv gcc gce gcg gcn gco gcr ge- gec gee geg gen geo ger gev ggc ggg ggn ggo ggr ggv gnc gne gnn gno gnr gnv goc goe gog gon goo gor gov grc gre grg grn gro grr grv gvc gve gvg gvn gvo gvr ncc nce ncg ncn nco ncr ncv ne- nec nee neg nen neo ner nev ngc nge ngg ngn ngo nnc nne nng nnn nno nnv no- noc noe nog non noo nor nov nrc nre nrg nrn nro nrr nrv nvc nve nvg nvn nvv oc- occ ocg ocn oco ocr ocv oec oee oeg oen oeo oer ogc oge ogg ogn ogo on- onc one ong onn ono onr oo- ooc oog oon ooo oor oov or- orc ore org orn oro orr orv ov- ovc ove ovo ovv rcc rce rcg rcn rco rcr rcv re- rec ree reg ren reo rer rev rgc rge rgg rgn rgo rgr rgv rnc rng rnn rno rnr rnv roc roe rog ron roo ror rov rrc rrg rrn rrr rvc rve rvg rvn rvo rvr rvv v-e vcc vce vcn vco vcr vec vee veg ven veo ver vgc vgg vgn vgo vgr vn- vng vno vnr vnv voc voe vog von voo vor vov vrc vre vrg vrn vrr vvc vvg vvo vvr vvv