c-- ccc ccd ccn cco ccp cct cdc cdd cdn cdo cdp cdt cn- cnc cnd cnn cno cnp cnt co- coc cod con coo cop cot cpc cpd cpn cpo cpp cpt ctc ctd ctn cto ctp ctt dcc dcd dcn dco dcp dct ddc ddd ddn ddo ddp ddt dnc dnd dnn dno dnp dnt doc dod don doo dop dot dpc dpd dpn dpo dpp dpt dtc dtd dtn dto dtp dtt ncc ncd ncn nco ncp nct ndc ndd ndn ndo ndp ndt nnc nnn nno nnp nnt no- noc nod non noo nop not npc npd npn npo npp npt ntc ntd ntn nto ntp ntt oc- occ ocd ocn oco ocp oct odc odd odn odo odp odt on- onc ond onn ono onp ont oo- ooc ood oon ooo oop oot op- opc opd opn opo opp opt ot- otc otd otn oto otp ott p-p pcc pcd pcn pco pcp pct pdc pdd pdn pdo pdp pdt pn- pnc pnd pnn pno pnp pnt poc pod pon poo pop pot ppc ppd ppn ppo ppp ppt pt- ptc ptd ptn pto ptp ptt tcc tcd tcn tco tcp tct tdc tdd tdn tdo tdp tdt tnc tnd tnn tno tnp tnt to- toc tod ton too top tot tpc tpd tpn tpo tpp tpt ttc ttd ttn tto ttp ttt