-er c-- ccc cce ccf ccm cco ccp ccr cct ce- cec cee cef cem ceo cep cer cet cfc cfe cff cfm cfo cfp cfr cft cmc cme cmf cmm cmo cmp cmr cmt co- coc coe cof com coo cop cor cot cpc cpe cpf cpm cpo cpp cpr cpt crc cre crf crm cro crp crr crt ctc cte ctf ctm cto ctp ctr ctt ec- ecc ece ecf ecm eco ecr ect eec eee eef eem eeo eep eer eet ef- efc efe eff efm efo efp efr eft em- emc eme emf emm emo emp emr emt eo- eoc eoe eof eom eoo eop eor eot ep- epc epe epf epm epo epp epr ept erc ere erf erm ero erp err ert etc ete etf etm eto etp etr ett fcc fce fcf fcm fco fcp fcr fct fec fee fef fem feo fep fer fet ffc ffe fff ffm ffo ffp ffr fft fmc fme fmf fmm fmo fmp fmr fmt foc foe fof fom foo fop for fot fpc fpe fpm fpo fpp fpr fpt frc fre frf frm fro frp frr frt ftc fte ftf ftm fto ftp ftr ftt m-f m-o m-r mc- mcc mce mcf mcm mco mcp mcr mct mec mee mef mem meo mep mer met mfc mfe mff mfm mfo mfp mfr mft mmc mme mmf mmm mmo mmp mmr mmt moc moe mof mom moo mop mor mot mpc mpe mpf mpm mpo mpp mpr mpt mrc mre mrf mrm mro mrp mrr mrt mtc mte mtf mtm mto mtp mtr mtt oc- occ ocf ocm oco ocp ocr oct oec oee oef oem oeo oep oer oet of- ofc ofe off ofm ofo ofp ofr oft om- omc ome omf omm omo omp omr omt oo- ooc oof oom ooo oop oor oot op- opc ope opf opm opo opp opr opt or- orc ore orf orm oro orp orr ort ot- otc ote otf otm oto otp otr ott p-p pcc pce pcf pcm pco pcp pcr pct pec pee pef pem peo pep per pet pfc pfe pff pfm pfo pfp pfr pft pmc pme pmf pmm pmo pmp pmr pmt poc poe pof pom poo pop por pot ppc ppe ppf ppm ppo ppp ppr ppt prc pre prf prm pro prp prr prt pt- ptc pte ptf ptm pto ptp ptr ptt rcc rce rcf rcm rco rcp rcr rct re- rec ree ref rem reo rep rer ret rfc rfe rff rfm rfo rfp rfr rft rmc rme rmf rmm rmo rmp rmr rmt roc roe rof rom roo rop ror rot rpc rpe rpf rpm rpo rpp rpr rpt rrc rrf rrm rrp rrr rrt rtc rte rtf rtm rto rtp rtr rtt tcc tce tcf tcm tco tcp tcr tct te- tec tee tef tem teo tep ter tet tfc tfe tff tfm tfo tfp tfr tft tmc tme tmf tmm tmo tmp tmr tmt to- toc toe tof tom too top tor tot tpc tpe tpf tpm tpo tpp tpr tpt trc tre trf trm tro trp trr trt ttc tte ttf ttm tto ttp ttr ttt