c-- ccc ccd cce cck cco ccp ccs cct cdc cdd cde cdk cdo cdp cds cdt ce- cec ced cee cek ceo cep ces cet ckc ckd cko cks ckt co- coc cod coe cok coo cop cos cot cpc cpd cpe cpk cpo cpp cps cpt csc csd cse csk cso csp css cst ctc ctd cte ctk cto ctp cts ctt dcc dcd dce dck dco dcp dcs dct ddc ddd dde ddk ddo ddp dds ddt de- dec ded dee dek deo dep des det dkc dke dkk dko dkp dks dkt doc dod doe dok doo dop dos dot dpc dpd dpe dpk dpo dpp dps dpt dsc dsd dse dsk dso dsp dss dst dtc dtd dte dtk dto dtp dts dtt ec- ecc ecd ece eck eco ecs ect ed- edc edd ede edk edo edp eds edt eec eed eee eek eeo eep ees eet ekc ekd eke eko ekp eks ekt eo- eoc eod eoe eok eoo eop eos eot ep- epc epd epe epo epp eps ept es- esc esd ese esk eso esp ess est etc etd ete etk eto etp ets ett k-t kcc kcd kce kck kcp kcs kct kdc kde kdk kdo kdp kds kdt ke- kec ked kee kek keo kep kes ket kkc kke kkk kkp kks kkt koc kod koe kok koo kop kos kot kpc kpd kpe kpk kpo kpp kps kpt ksc ksd kse ksk kso ksp kss kst ktc kte ktk kto ktp kts ktt oc- occ ocd ock oco ocp ocs oct odc odd ode odo odp ods odt oec oed oee oeo oep oes oet okc okd oke okk oko okp oks oo- ooc ood ook ooo oop oos oot op- opc opd ope opk opo opp ops opt os- osc osd ose osk oso osp oss ost ot- otc otd ote otk oto otp ots ott p-p pcc pcd pce pck pco pcp pcs pct pdc pdd pde pdk pdo pdp pds pdt pec ped pee pek peo pep pes pet pkc pkd pke pko pkp pks pkt poc pod poe pok poo pop pos pot ppc ppd ppe ppk ppo ppp pps ppt ps- psc psd pse psk pso psp pss pst pt- ptc ptd pte ptk pto ptp pts ptt scc scd sce sck sco scp scs sct sdc sdd sde sdk sdo sdp sds sdt se- sec sed see sek seo sep ses set sk- skc skd ske skk sko skp sks skt soc sod soe sok soo sop sos sot spc spd spe spk spo spp sps spt ss- ssc ssd sse ssk sso ssp sss sst stc std ste stk sto stp sts stt tcc tcd tce tck tco tcp tcs tct tdc tdd tde tdk tdo tdp tds tdt te- tec ted tee tek teo tep tes tet tkc tke tkk tko tkp tks tkt to- toc tod toe tok too top tos tot tpc tpd tpe tpk tpo tpp tps tpt tsc tsd tse tsk tso tsp tss tst ttc ttd tte ttk tto ttp tts ttt