-er c-- ccc ccd cce ccn ccp ccr ccs cct cdc cdd cde cdn cdp cdr cds cdt ce- cec ced cee cen cep cer ces cet cn- cnc cnd cne cnn cnp cnr cns cnt cpc cpd cpe cpn cpp cpr cps cpt crc crd cre crn crp crr crs crt csc csd cse csn csp csr css cst ctc ctd cte ctn ctp ctr cts ctt dcc dcd dce dcn dcp dcr dcs dct ddc ddd dde ddn ddp ddr dds ddt de- dec ded dee den dep der des det dnc dnd dne dnn dnp dnr dns dnt dpc dpd dpe dpn dpp dpr dps dpt drc drd dre drn drp drr drs drt dsc dsd dse dsn dsp dsr dss dst dtc dtd dte dtn dtp dtr dts dtt ec- ecc ecd ece ecn ecr ecs ect ed- edc edd ede edn edp edr eds edt eec eed eee een eep eer ees eet en- enc end ene enn enp enr ens ent ep- epc epd epe epn epp epr eps ept erc erd ere ern erp err ers ert es- esc esd ese esn esp esr ess est etc etd ete etn etp etr ets ett ncc ncd nce ncn ncp ncr ncs nct ndc ndd nde ndn ndp ndr nds ndt ne- nec ned nee nen nep ner nes net nnc nne nnn nnp nns nnt npc npd npe npn npp npr nps npt nrc nrd nre nrn nrp nrr nrs nrt nsc nsd nse nsn nsp nsr nss nst ntc ntd nte ntn ntp ntr nts ntt p-p pcc pcd pce pcn pcp pcr pcs pct pdc pdd pde pdn pdp pdr pds pdt pec ped pee pen pep per pes pet pn- pnc pnd pne pnn pnp pnr pns pnt ppc ppd ppe ppn ppp ppr pps ppt prc prd pre prn prp prr prs prt ps- psc psd pse psn psp psr pss pst pt- ptc ptd pte ptn ptp ptr pts ptt rcc rcd rce rcn rcp rcr rcs rct rdc rdd rde rdn rdp rdr rds rdt re- rec red ree ren rep rer res ret rnc rnd rnn rnp rnr rns rnt rpc rpd rpe rpn rpp rpr rps rpt rrc rrd rrn rrp rrr rrs rrt rsc rsd rse rsn rsp rsr rss rst rtc rtd rte rtn rtp rtr rts rtt scc scd sce scn scp scr scs sct sdc sdd sde sdn sdp sdr sds sdt se- sec sed see sen sep ser ses set snc snd sne snn snp snr sns snt spc spd spe spn spp spr sps spt sr- src srd sre srn srp srr srs srt ss- ssc ssd sse ssn ssp ssr sss sst stc std ste stn stp str sts stt tcc tcd tce tcn tcp tcr tcs tct tdc tdd tde tdn tdp tdr tds tdt te- tec ted tee ten tep ter tes tet tnc tnd tne tnn tnp tnr tns tnt tpc tpd tpe tpn tpp tpr tps tpt trc trd tre trn trp trr trs trt tsc tsd tse tsn tsp tsr tss tst ttc ttd tte ttn ttp ttr tts ttt