-er c-- ccc ccd cce ccf ccn cco ccr cct cdc cdd cde cdf cdn cdo cdr cdt ce- cec ced cee cef cen ceo cer cet cfc cfd cfe cff cfn cfo cfr cft cn- cnc cnd cne cnf cnn cno cnr cnt co- coc cod coe cof con coo cor cot crc crd cre crf crn cro crr crt ctc ctd cte ctf ctn cto ctr ctt dcc dcd dce dcf dcn dco dcr dct ddc ddd dde ddf ddn ddo ddr ddt de- dec ded dee def den deo der det dfc dfd dfe dff dfn dfo dfr dft dnc dnd dne dnf dnn dno dnr dnt doc dod doe dof don doo dor dot drc drd dre drn dro drr drt dtc dtd dte dtf dtn dto dtr dtt ec- ecc ecd ece ecf ecn eco ecr ect ed- edc edd ede edf edn edo edr edt eec eed eee eef een eeo eer eet ef- efc efd efe eff efo efr eft en- enc end ene enf enn eno enr ent eo- eoc eod eoe eof eon eoo eor eot erc erd ere erf ern ero err ert etc etd ete etf etn eto etr ett fcc fcd fce fcf fcn fco fcr fct fdc fdd fde fdf fdn fdo fdr fdt fec fed fee fef fen feo fer fet ffc ffd ffe fff ffn ffo ffr fft fnc fnd fne fnf fnn fnr fnt foc foe fof fon foo for fot frc frd fre frf frn fro frr frt ftc ftd fte ftf ftn fto ftr ftt ncc ncd nce ncf ncn nco ncr nct ndc ndd nde ndf ndn ndo ndr ndt ne- nec ned nee nef nen neo ner net nfc nfd nfe nff nfn nfo nfr nft nnc nne nnf nnn nno nnt no- noc nod noe nof non noo nor not nrc nrd nre nrf nrn nro nrr nrt ntc ntd nte ntf ntn nto ntr ntt oc- occ ocd ocf ocn oco ocr oct odc odd ode odf odn odo odr odt oec oed oee oef oen oeo oer oet of- ofc ofd ofe off ofn ofo ofr oft on- onc ond one onf onn ono onr ont oo- ooc ood oof oon ooo oor oot or- orc ord ore orf orn oro orr ort ot- otc otd ote otf otn oto otr ott rcc rcd rce rcf rcn rco rcr rct rdc rdd rde rdf rdn rdo rdr rdt re- rec red ree ref ren reo rer ret rfc rfd rfe rff rfn rfo rfr rft rnc rnd rnn rno rnr rnt roc rod roe rof ron roo ror rot rrc rrd rrf rrn rrr rrt rtc rtd rte rtf rtn rto rtr rtt tcc tcd tce tcf tcn tco tcr tct tdc tdd tde tdf tdn tdo tdr tdt te- tec ted tee tef ten teo ter tet tfc tfd tfe tff tfn tfo tfr tft tnc tnd tne tnf tnn tno tnr tnt to- toc tod toe tof ton too tor tot trc trd tre trf trn tro trr trt ttc ttd tte ttf ttn tto ttr ttt