c-- ccc ccm cco ccp ccr cct cmc cmm cmo cmp cmr cmt co- coc com coo cop cor cot cpc cpm cpo cpp cpr cpt crc crm cro crp crr crt ctc ctm cto ctp ctr ctt m-o m-r mc- mcc mcm mco mcp mcr mct mmc mmm mmo mmp mmr mmt moc mom moo mop mor mot mpc mpm mpo mpp mpr mpt mrc mrm mro mrp mrr mrt mtc mtm mto mtp mtr mtt oc- occ ocm oco ocp ocr oct om- omc omm omo omp omr omt oo- ooc oom ooo oop oor oot op- opc opm opo opp opr opt or- orc orm oro orp orr ort ot- otc otm oto otp otr ott p-p pcc pcm pco pcp pcr pct pmc pmm pmo pmp pmr pmt poc pom poo pop por pot ppc ppm ppo ppp ppr ppt prc prm pro prp prr prt pt- ptc ptm pto ptp ptr ptt rcc rcm rco rcp rcr rct rmc rmm rmo rmp rmr rmt roc rom roo rop ror rot rpc rpm rpo rpp rpr rpt rrc rrm rrp rrr rrt rtc rtm rto rtp rtr rtt tcc tcm tco tcp tcr tct tmc tmm tmo tmp tmr tmt to- toc tom too top tor tot tpc tpm tpo tpp tpr tpt trc trm tro trp trr trt ttc ttm tto ttp ttr ttt