c-- ccc ccd cce cck cco ccp cct cdc cdd cde cdk cdo cdp cdt ce- cec ced cee cek ceo cep cet ckc ckd cko ckt co- coc cod coe cok coo cop cot cpc cpd cpe cpk cpo cpp cpt ctc ctd cte ctk cto ctp ctt dcc dcd dce dck dco dcp dct ddc ddd dde ddk ddo ddp ddt de- dec ded dee dek deo dep det dkc dke dkk dko dkp dkt doc dod doe dok doo dop dot dpc dpd dpe dpk dpo dpp dpt dtc dtd dte dtk dto dtp dtt ec- ecc ecd ece eck eco ect ed- edc edd ede edk edo edp edt eec eed eee eek eeo eep eet ekc ekd eke eko ekp ekt eo- eoc eod eoe eok eoo eop eot ep- epc epd epe epo epp ept etc etd ete etk eto etp ett k-t kcc kcd kce kck kcp kct kdc kde kdk kdo kdp kdt ke- kec ked kee kek keo kep ket kkc kke kkk kkp kkt koc kod koe kok koo kop kot kpc kpd kpe kpk kpo kpp kpt ktc kte ktk kto ktp ktt oc- occ ocd ock oco ocp oct odc odd ode odo odp odt oec oed oee oeo oep oet okc okd oke okk oko okp oo- ooc ood ook ooo oop oot op- opc opd ope opk opo opp opt ot- otc otd ote otk oto otp ott p-p pcc pcd pce pck pco pcp pct pdc pdd pde pdk pdo pdp pdt pec ped pee pek peo pep pet pkc pkd pke pko pkp pkt poc pod poe pok poo pop pot ppc ppd ppe ppk ppo ppp ppt pt- ptc ptd pte ptk pto ptp ptt tcc tcd tce tck tco tcp tct tdc tdd tde tdk tdo tdp tdt te- tec ted tee tek teo tep tet tkc tke tkk tko tkp tkt to- toc tod toe tok too top tot tpc tpd tpe tpk tpo tpp tpt ttc ttd tte ttk tto ttp ttt