c-- ccc ccd cck cco ccp ccr ccs cct cdc cdd cdk cdo cdp cdr cds cdt ckc ckd cko cks ckt co- coc cod cok coo cop cor cos cot cpc cpd cpk cpo cpp cpr cps cpt crc crd crk cro crp crr crs crt csc csd csk cso csp csr css cst ctc ctd ctk cto ctp ctr cts ctt dcc dcd dck dco dcp dcr dcs dct ddc ddd ddk ddo ddp ddr dds ddt dkc dkk dko dkp dkr dks dkt doc dod dok doo dop dor dos dot dpc dpd dpk dpo dpp dpr dps dpt drc drd drk dro drp drr drs drt dsc dsd dsk dso dsp dsr dss dst dtc dtd dtk dto dtp dtr dts dtt k-t kcc kcd kck kcp kcr kcs kct kdc kdk kdo kdp kdr kds kdt kkc kkk kkp kkr kks kkt koc kod kok koo kop kor kos kot kpc kpd kpk kpo kpp kpr kps kpt krc krd krk kro krp krr krs krt ksc ksd ksk kso ksp ksr kss kst ktc ktk kto ktp ktr kts ktt oc- occ ocd ock oco ocp ocr ocs oct odc odd odo odp odr ods odt okc okd okk oko okp okr oks oo- ooc ood ook ooo oop oor oos oot op- opc opd opk opo opp opr ops opt or- orc ord ork oro orp orr ors ort os- osc osd osk oso osp osr oss ost ot- otc otd otk oto otp otr ots ott p-p pcc pcd pck pco pcp pcr pcs pct pdc pdd pdk pdo pdp pdr pds pdt pkc pkd pko pkp pkr pks pkt poc pod pok poo pop por pos pot ppc ppd ppk ppo ppp ppr pps ppt prc prd prk pro prp prr prs prt ps- psc psd psk pso psp psr pss pst pt- ptc ptd ptk pto ptp ptr pts ptt rcc rcd rco rcp rcr rcs rct rdc rdd rdo rdp rdr rds rdt rkc rkk rko rkp rks rkt roc rod rok roo rop ror ros rot rpc rpd rpk rpo rpp rpr rps rpt rrc rrd rrk rrp rrr rrs rrt rsc rsd rsk rso rsp rsr rss rst rtc rtd rtk rto rtp rtr rts rtt scc scd sck sco scp scr scs sct sdc sdd sdk sdo sdp sdr sds sdt sk- skc skd skk sko skp skr sks skt soc sod sok soo sop sor sos sot spc spd spk spo spp spr sps spt sr- src srd srk sro srp srr srs srt ss- ssc ssd ssk sso ssp ssr sss sst stc std stk sto stp str sts stt tcc tcd tck tco tcp tcr tcs tct tdc tdd tdk tdo tdp tdr tds tdt tkc tkk tko tkp tkr tks tkt to- toc tod tok too top tor tos tot tpc tpd tpk tpo tpp tpr tps tpt trc trd trk tro trp trr trs trt tsc tsd tsk tso tsp tsr tss tst ttc ttd ttk tto ttp ttr tts ttt