-er c-- ccc cce ccf ccn cco ccr ccv ce- cec cee cef cen ceo cer cev cfc cfe cff cfn cfo cfr cfv cn- cnc cne cnf cnn cno cnr cnv co- coc coe cof con coo cor cov crc cre crf crn cro crr crv cvc cve cvf cvn cvo cvr cvv ec- ecc ece ecf ecn eco ecr ecv eec eee eef een eeo eer eev ef- efc efe eff efo efr en- enc ene enf enn eno enr env eo- eoc eoe eof eon eoo eor erc ere erf ern ero err erv evc eve evf evn evo evr evv fcc fce fcf fcn fco fcr fcv fec fee fef fen feo fer fev ffc ffe fff ffn ffo ffr ffv fnc fne fnf fnn fnr fnv foc foe fof fon foo for frc fre frf frn fro frr fvc ncc nce ncf ncn nco ncr ncv ne- nec nee nef nen neo ner nev nfc nfe nff nfn nfo nfr nfv nnc nne nnf nnn nno nnv no- noc noe nof non noo nor nov nrc nre nrf nrn nro nrr nrv nvc nve nvn nvv oc- occ ocf ocn oco ocr ocv oec oee oef oen oeo oer of- ofc ofe off ofn ofo ofr ofv on- onc one onf onn ono onr oo- ooc oof oon ooo oor oov or- orc ore orf orn oro orr orv ov- ovc ove ovf ovo ovv rcc rce rcf rcn rco rcr rcv re- rec ree ref ren reo rer rev rfc rfe rff rfn rfo rfr rfv rnc rnn rno rnr rnv roc roe rof ron roo ror rov rrc rrf rrn rrr rvc rve rvf rvn rvo rvr rvv v-e vcc vce vcf vcn vco vcr vec vee vef ven veo ver vfc vff vfn vfr vfv vn- vnf vno vnr vnv voc voe vof von voo vor vov vrc vre vrf vrn vrr vvc vvo vvr vvv