-er c-- ccc ccd cce ccf ccn cco ccr ccv cdc cdd cde cdf cdn cdo cdr cdv ce- cec ced cee cef cen ceo cer cev cfc cfd cfe cff cfn cfo cfr cfv cn- cnc cnd cne cnf cnn cno cnr cnv co- coc cod coe cof con coo cor cov crc crd cre crf crn cro crr crv cvc cvd cve cvf cvn cvo cvr cvv dcc dcd dce dcf dcn dco dcr dcv ddc ddd dde ddf ddn ddo ddr de- dec ded dee def den deo der dev dfc dfd dfe dff dfn dfo dfr dfv dnc dnd dne dnf dnn dno dnr doc dod doe dof don doo dor dov drc drd dre drn dro drr drv dvc dvd dve dvn dvr ec- ecc ecd ece ecf ecn eco ecr ecv ed- edc edd ede edf edn edo edr eec eed eee eef een eeo eer eev ef- efc efd efe eff efo efr en- enc end ene enf enn eno enr env eo- eoc eod eoe eof eon eoo eor erc erd ere erf ern ero err erv evc evd eve evf evn evo evr evv fcc fcd fce fcf fcn fco fcr fcv fdc fdd fde fdf fdn fdo fdr fec fed fee fef fen feo fer fev ffc ffd ffe fff ffn ffo ffr ffv fnc fnd fne fnf fnn fnr fnv foc foe fof fon foo for frc frd fre frf frn fro frr fvc fvd ncc ncd nce ncf ncn nco ncr ncv ndc ndd nde ndf ndn ndo ndr ndv ne- nec ned nee nef nen neo ner nev nfc nfd nfe nff nfn nfo nfr nfv nnc nne nnf nnn nno nnv no- noc nod noe nof non noo nor nov nrc nrd nre nrf nrn nro nrr nrv nvc nvd nve nvn nvv oc- occ ocd ocf ocn oco ocr ocv odc odd ode odf odn odo odr odv oec oed oee oef oen oeo oer of- ofc ofd ofe off ofn ofo ofr ofv on- onc ond one onf onn ono onr oo- ooc ood oof oon ooo oor oov or- orc ord ore orf orn oro orr orv ov- ovc ovd ove ovf ovo ovv rcc rcd rce rcf rcn rco rcr rcv rdc rdd rde rdf rdn rdo rdr rdv re- rec red ree ref ren reo rer rev rfc rfd rfe rff rfn rfo rfr rfv rnc rnd rnn rno rnr rnv roc rod roe rof ron roo ror rov rrc rrd rrf rrn rrr rvc rvd rve rvf rvn rvo rvr rvv v-e vcc vcd vce vcf vcn vco vcr vdc vdd vde vdf vdo vdr vdv vec ved vee vef ven veo ver vfc vfd vff vfn vfr vfv vn- vnd vnf vno vnr vnv voc vod voe vof von voo vor vov vrc vrd vre vrf vrn vrr vvc vvo vvr vvv