c-- ccc ccd cce ccn cco ccp cct cdc cdd cde cdn cdo cdp cdt ce- cec ced cee cen ceo cep cet cn- cnc cnd cne cnn cno cnp cnt co- coc cod coe con coo cop cot cpc cpd cpe cpn cpo cpp cpt ctc ctd cte ctn cto ctp ctt dcc dcd dce dcn dco dcp dct ddc ddd dde ddn ddo ddp ddt de- dec ded dee den deo dep det dnc dnd dne dnn dno dnp dnt doc dod doe don doo dop dot dpc dpd dpe dpn dpo dpp dpt dtc dtd dte dtn dto dtp dtt ec- ecc ecd ece ecn eco ect ed- edc edd ede edn edo edp edt eec eed eee een eeo eep eet en- enc end ene enn eno enp ent eo- eoc eod eoe eon eoo eop eot ep- epc epd epe epn epo epp ept etc etd ete etn eto etp ett ncc ncd nce ncn nco ncp nct ndc ndd nde ndn ndo ndp ndt ne- nec ned nee nen neo nep net nnc nne nnn nno nnp nnt no- noc nod noe non noo nop not npc npd npe npn npo npp npt ntc ntd nte ntn nto ntp ntt oc- occ ocd ocn oco ocp oct odc odd ode odn odo odp odt oec oed oee oen oeo oep oet on- onc ond one onn ono onp ont oo- ooc ood oon ooo oop oot op- opc opd ope opn opo opp opt ot- otc otd ote otn oto otp ott p-p pcc pcd pce pcn pco pcp pct pdc pdd pde pdn pdo pdp pdt pec ped pee pen peo pep pet pn- pnc pnd pne pnn pno pnp pnt poc pod poe pon poo pop pot ppc ppd ppe ppn ppo ppp ppt pt- ptc ptd pte ptn pto ptp ptt tcc tcd tce tcn tco tcp tct tdc tdd tde tdn tdo tdp tdt te- tec ted tee ten teo tep tet tnc tnd tne tnn tno tnp tnt to- toc tod toe ton too top tot tpc tpd tpe tpn tpo tpp tpt ttc ttd tte ttn tto ttp ttt