-er -ol c-- ccc cce ccf ccl cco ccr ccv ce- cec cee cef cel ceo cer cev cfc cfe cff cfl cfo cfr cfv cl- clc cle clf cll clo clr clv co- coc coe cof col coo cor cov crc cre crf crl cro crr crv cvc cve cvf cvl cvo cvr cvv ec- ecc ece ecf ecl eco ecr ecv eec eee eef eel eeo eer eev ef- efc efe eff efl efo efr elc ele elf ell elo elr elv eo- eoc eoe eof eol eoo eor erc ere erf erl ero err erv evc eve evf evl evo evr evv fcc fce fcf fcl fco fcr fcv fec fee fef fel feo fer fev ffc ffe fff ffl ffo ffr ffv flc fle flf fll flo flr foc foe fof fol foo for frc fre frf frl fro frr fvc lcc lce lcf lcl lco lcr lcv lec lee lef lel leo ler lev lfc lfe lff lfl lfo lfr llc lle llf lll llo llr llv loc loe lof lol loo lor lov lrc lrf lro lrr lrv lvc lve lvf lvl lvr lvv oc- occ ocf ocl oco ocr ocv oec oee oef oel oeo oer of- ofc ofe off ofl ofo ofr ofv olc ole olf oll olo oo- ooc oof ool ooo oor oov or- orc ore orf orl oro orr orv ov- ovc ove ovf ovl ovo ovv rcc rce rcf rcl rco rcr rcv re- rec ree ref rel reo rer rev rfc rfe rff rfl rfo rfr rfv rlc rle rlf rll rlo rlr roc roe rof rol roo ror rov rrc rrf rrl rrr rvc rve rvf rvl rvo rvr rvv v-e vcc vce vcf vcl vco vcr vec vee vef vel veo ver vfc vff vfl vfr vfv vl- vlc vle vlf vll vlo vlv voc voe vof vol voo vor vov vrc vre vrf vrr vvc vvo vvr vvv