c-- ccc ccd cce cco ccp ccs cct cdc cdd cde cdo cdp cds cdt ce- cec ced cee ceo cep ces cet co- coc cod coe coo cop cos cot cpc cpd cpe cpo cpp cps cpt csc csd cse cso csp css cst ctc ctd cte cto ctp cts ctt dcc dcd dce dco dcp dcs dct ddc ddd dde ddo ddp dds ddt de- dec ded dee deo dep des det doc dod doe doo dop dos dot dpc dpd dpe dpo dpp dps dpt dsc dsd dse dso dsp dss dst dtc dtd dte dto dtp dts dtt ec- ecc ecd ece eco ecs ect ed- edc edd ede edo edp eds edt eec eed eee eeo eep ees eet eo- eoc eod eoe eoo eop eos eot ep- epc epd epe epo epp eps ept es- esc esd ese eso esp ess est etc etd ete eto etp ets ett oc- occ ocd oco ocp ocs oct odc odd ode odo odp ods odt oec oed oee oeo oep oes oet oo- ooc ood ooo oop oos oot op- opc opd ope opo opp ops opt os- osc osd ose oso osp oss ost ot- otc otd ote oto otp ots ott p-p pcc pcd pce pco pcp pcs pct pdc pdd pde pdo pdp pds pdt pec ped pee peo pep pes pet poc pod poe poo pop pos pot ppc ppd ppe ppo ppp pps ppt ps- psc psd pse pso psp pss pst pt- ptc ptd pte pto ptp pts ptt scc scd sce sco scp scs sct sdc sdd sde sdo sdp sds sdt se- sec sed see seo sep ses set soc sod soe soo sop sos sot spc spd spe spo spp sps spt ss- ssc ssd sse sso ssp sss sst stc std ste sto stp sts stt tcc tcd tce tco tcp tcs tct tdc tdd tde tdo tdp tds tdt te- tec ted tee teo tep tes tet to- toc tod toe too top tos tot tpc tpd tpe tpo tpp tps tpt tsc tsd tse tso tsp tss tst ttc ttd tte tto ttp tts ttt