-er c-- ccc cce ccg cco ccp ccr ccv ce- cec cee ceg ceo cep cer cev cgc cge cgg cgo cgp cgr cgv co- coc coe cog coo cop cor cov cpc cpe cpg cpo cpp cpr cpv crc cre crg cro crp crr crv cvc cve cvg cvo cvp cvr cvv ec- ecc ece ecg eco ecr ecv eec eee eeg eeo eep eer eev egc ege egg ego egp egr eo- eoc eoe eog eoo eop eor ep- epc epe epg epo epp epr erc ere erg ero erp err erv evc eve evg evo evp evr evv g-p gcc gce gcg gco gcp gcr ge- gec gee geg geo gep ger gev ggc ggg ggo ggp ggr ggv goc goe gog goo gop gor gov gpc gpe gpg gpo gpp gpr grc gre grg gro grp grr grv gvc gve gvg gvo gvp gvr oc- occ ocg oco ocp ocr ocv oec oee oeg oeo oep oer ogc oge ogg ogo ogp oo- ooc oog ooo oop oor oov op- opc ope opg opo opp opr opv or- orc ore org oro orp orr orv ov- ovc ove ovo ovp ovv p-p pcc pce pcg pco pcp pcr pcv pec pee peg peo pep per pev pgc pge pgg pgo pgp pgr pgv poc poe pog poo pop por pov ppc ppe ppg ppo ppp ppr ppv prc pre prg pro prp prr prv pvc pve pvg pvo pvp pvr pvv rcc rce rcg rco rcp rcr rcv re- rec ree reg reo rep rer rev rgc rge rgg rgo rgp rgr rgv roc roe rog roo rop ror rov rpc rpe rpg rpo rpp rpr rpv rrc rrg rrp rrr rvc rve rvg rvo rvp rvr rvv v-e vcc vce vco vcp vcr vec vee veg veo vep ver vgc vgg vgo vgp vgr voc voe vog voo vop vor vov vpc vpe vpg vpo vpp vpr vrc vre vrg vrp vrr vvc vvg vvo vvr vvv