c-- ccc ccd ccn cco ccp ccr cct cdc cdd cdn cdo cdp cdr cdt cn- cnc cnd cnn cno cnp cnr cnt co- coc cod con coo cop cor cot cpc cpd cpn cpo cpp cpr cpt crc crd crn cro crp crr crt ctc ctd ctn cto ctp ctr ctt dcc dcd dcn dco dcp dcr dct ddc ddd ddn ddo ddp ddr ddt dnc dnd dnn dno dnp dnr dnt doc dod don doo dop dor dot dpc dpd dpn dpo dpp dpr dpt drc drd drn dro drp drr drt dtc dtd dtn dto dtp dtr dtt ncc ncd ncn nco ncp ncr nct ndc ndd ndn ndo ndp ndr ndt nnc nnn nno nnp nnt no- noc nod non noo nop nor not npc npd npn npo npp npr npt nrc nrd nrn nro nrp nrr nrt ntc ntd ntn nto ntp ntr ntt oc- occ ocd ocn oco ocp ocr oct odc odd odn odo odp odr odt on- onc ond onn ono onp onr ont oo- ooc ood oon ooo oop oor oot op- opc opd opn opo opp opr opt or- orc ord orn oro orp orr ort ot- otc otd otn oto otp otr ott p-p pcc pcd pcn pco pcp pcr pct pdc pdd pdn pdo pdp pdr pdt pn- pnc pnd pnn pno pnp pnr pnt poc pod pon poo pop por pot ppc ppd ppn ppo ppp ppr ppt prc prd prn pro prp prr prt pt- ptc ptd ptn pto ptp ptr ptt rcc rcd rcn rco rcp rcr rct rdc rdd rdn rdo rdp rdr rdt rnc rnd rnn rno rnp rnr rnt roc rod ron roo rop ror rot rpc rpd rpn rpo rpp rpr rpt rrc rrd rrn rrp rrr rrt rtc rtd rtn rto rtp rtr rtt tcc tcd tcn tco tcp tcr tct tdc tdd tdn tdo tdp tdr tdt tnc tnd tnn tno tnp tnr tnt to- toc tod ton too top tor tot tpc tpd tpn tpo tpp tpr tpt trc trd trn tro trp trr trt ttc ttd ttn tto ttp ttr ttt