-er c-- ccc ccd cce ccm cco ccp ccr cct cdc cdd cde cdm cdo cdp cdr cdt ce- cec ced cee cem ceo cep cer cet cmc cmd cme cmm cmo cmp cmr cmt co- coc cod coe com coo cop cor cot cpc cpd cpe cpm cpo cpp cpr cpt crc crd cre crm cro crp crr crt ctc ctd cte ctm cto ctp ctr ctt dcc dcd dce dcm dco dcp dcr dct ddc ddd dde ddm ddo ddp ddr ddt de- dec ded dee dem deo dep der det dmc dmd dme dmm dmo dmp dmr dmt doc dod doe dom doo dop dor dot dpc dpd dpe dpm dpo dpp dpr dpt drc drd dre drm dro drp drr drt dtc dtd dte dtm dto dtp dtr dtt ec- ecc ecd ece ecm eco ecr ect ed- edc edd ede edm edo edp edr edt eec eed eee eem eeo eep eer eet em- emc emd eme emm emo emp emr emt eo- eoc eod eoe eom eoo eop eor eot ep- epc epd epe epm epo epp epr ept erc erd ere erm ero erp err ert etc etd ete etm eto etp etr ett m-o m-r mc- mcc mcd mce mcm mco mcp mcr mct mdc mdd mde mdm mdo mdp mdr mdt mec med mee mem meo mep mer met mmc mmd mme mmm mmo mmp mmr mmt moc mod moe mom moo mop mor mot mpc mpd mpe mpm mpo mpp mpr mpt mrc mrd mre mrm mro mrp mrr mrt mtc mtd mte mtm mto mtp mtr mtt oc- occ ocd ocm oco ocp ocr oct odc odd ode odm odo odp odr odt oec oed oee oem oeo oep oer oet om- omc omd ome omm omo omp omr omt oo- ooc ood oom ooo oop oor oot op- opc opd ope opm opo opp opr opt or- orc ord ore orm oro orp orr ort ot- otc otd ote otm oto otp otr ott p-p pcc pcd pce pcm pco pcp pcr pct pdc pdd pde pdm pdo pdp pdr pdt pec ped pee pem peo pep per pet pmc pmd pme pmm pmo pmp pmr pmt poc pod poe pom poo pop por pot ppc ppd ppe ppm ppo ppp ppr ppt prc prd pre prm pro prp prr prt pt- ptc ptd pte ptm pto ptp ptr ptt rcc rcd rce rcm rco rcp rcr rct rdc rdd rde rdm rdo rdp rdr rdt re- rec red ree rem reo rep rer ret rmc rmd rme rmm rmo rmp rmr rmt roc rod roe rom roo rop ror rot rpc rpd rpe rpm rpo rpp rpr rpt rrc rrd rrm rrp rrr rrt rtc rtd rte rtm rto rtp rtr rtt tcc tcd tce tcm tco tcp tcr tct tdc tdd tde tdm tdo tdp tdr tdt te- tec ted tee tem teo tep ter tet tmc tmd tme tmm tmo tmp tmr tmt to- toc tod toe tom too top tor tot tpc tpd tpe tpm tpo tpp tpr tpt trc trd tre trm tro trp trr trt ttc ttd tte ttm tto ttp ttr ttt