c-- ccc ccd cce ccp ccs cct cdc cdd cde cdp cds cdt ce- cec ced cee cep ces cet cpc cpd cpe cpp cps cpt csc csd cse csp css cst ctc ctd cte ctp cts ctt dcc dcd dce dcp dcs dct ddc ddd dde ddp dds ddt de- dec ded dee dep des det dpc dpd dpe dpp dps dpt dsc dsd dse dsp dss dst dtc dtd dte dtp dts dtt ec- ecc ecd ece ecs ect ed- edc edd ede edp eds edt eec eed eee eep ees eet ep- epc epd epe epp eps ept es- esc esd ese esp ess est etc etd ete etp ets ett p-p pcc pcd pce pcp pcs pct pdc pdd pde pdp pds pdt pec ped pee pep pes pet ppc ppd ppe ppp pps ppt ps- psc psd pse psp pss pst pt- ptc ptd pte ptp pts ptt scc scd sce scp scs sct sdc sdd sde sdp sds sdt se- sec sed see sep ses set spc spd spe spp sps spt ss- ssc ssd sse ssp sss sst stc std ste stp sts stt tcc tcd tce tcp tcs tct tdc tdd tde tdp tds tdt te- tec ted tee tep tes tet tpc tpd tpe tpp tps tpt tsc tsd tse tsp tss tst ttc ttd tte ttp tts ttt