-er c-- ccc ccd cce ccn cco ccr cct cdc cdd cde cdn cdo cdr cdt ce- cec ced cee cen ceo cer cet cn- cnc cnd cne cnn cno cnr cnt co- coc cod coe con coo cor cot crc crd cre crn cro crr crt ctc ctd cte ctn cto ctr ctt dcc dcd dce dcn dco dcr dct ddc ddd dde ddn ddo ddr ddt de- dec ded dee den deo der det dnc dnd dne dnn dno dnr dnt doc dod doe don doo dor dot drc drd dre drn dro drr drt dtc dtd dte dtn dto dtr dtt ec- ecc ecd ece ecn eco ecr ect ed- edc edd ede edn edo edr edt eec eed eee een eeo eer eet en- enc end ene enn eno enr ent eo- eoc eod eoe eon eoo eor eot erc erd ere ern ero err ert etc etd ete etn eto etr ett ncc ncd nce ncn nco ncr nct ndc ndd nde ndn ndo ndr ndt ne- nec ned nee nen neo ner net nnc nne nnn nno nnt no- noc nod noe non noo nor not nrc nrd nre nrn nro nrr nrt ntc ntd nte ntn nto ntr ntt oc- occ ocd ocn oco ocr oct odc odd ode odn odo odr odt oec oed oee oen oeo oer oet on- onc ond one onn ono onr ont oo- ooc ood oon ooo oor oot or- orc ord ore orn oro orr ort ot- otc otd ote otn oto otr ott rcc rcd rce rcn rco rcr rct rdc rdd rde rdn rdo rdr rdt re- rec red ree ren reo rer ret rnc rnd rnn rno rnr rnt roc rod roe ron roo ror rot rrc rrd rrn rrr rrt rtc rtd rte rtn rto rtr rtt tcc tcd tce tcn tco tcr tct tdc tdd tde tdn tdo tdr tdt te- tec ted tee ten teo ter tet tnc tnd tne tnn tno tnr tnt to- toc tod toe ton too tor tot trc trd tre trn tro trr trt ttc ttd tte ttn tto ttr ttt