-er c-- ccc ccd cce ccn ccp ccr cct cdc cdd cde cdn cdp cdr cdt ce- cec ced cee cen cep cer cet cn- cnc cnd cne cnn cnp cnr cnt cpc cpd cpe cpn cpp cpr cpt crc crd cre crn crp crr crt ctc ctd cte ctn ctp ctr ctt dcc dcd dce dcn dcp dcr dct ddc ddd dde ddn ddp ddr ddt de- dec ded dee den dep der det dnc dnd dne dnn dnp dnr dnt dpc dpd dpe dpn dpp dpr dpt drc drd dre drn drp drr drt dtc dtd dte dtn dtp dtr dtt ec- ecc ecd ece ecn ecr ect ed- edc edd ede edn edp edr edt eec eed eee een eep eer eet en- enc end ene enn enp enr ent ep- epc epd epe epn epp epr ept erc erd ere ern erp err ert etc etd ete etn etp etr ett ncc ncd nce ncn ncp ncr nct ndc ndd nde ndn ndp ndr ndt ne- nec ned nee nen nep ner net nnc nne nnn nnp nnt npc npd npe npn npp npr npt nrc nrd nre nrn nrp nrr nrt ntc ntd nte ntn ntp ntr ntt p-p pcc pcd pce pcn pcp pcr pct pdc pdd pde pdn pdp pdr pdt pec ped pee pen pep per pet pn- pnc pnd pne pnn pnp pnr pnt ppc ppd ppe ppn ppp ppr ppt prc prd pre prn prp prr prt pt- ptc ptd pte ptn ptp ptr ptt rcc rcd rce rcn rcp rcr rct rdc rdd rde rdn rdp rdr rdt re- rec red ree ren rep rer ret rnc rnd rnn rnp rnr rnt rpc rpd rpe rpn rpp rpr rpt rrc rrd rrn rrp rrr rrt rtc rtd rte rtn rtp rtr rtt tcc tcd tce tcn tcp tcr tct tdc tdd tde tdn tdp tdr tdt te- tec ted tee ten tep ter tet tnc tnd tne tnn tnp tnr tnt tpc tpd tpe tpn tpp tpr tpt trc trd tre trn trp trr trt ttc ttd tte ttn ttp ttr ttt