-er c-- ccc cce ccf ccm ccp ccr cct ce- cec cee cef cem cep cer cet cfc cfe cff cfm cfp cfr cft cmc cme cmf cmm cmp cmr cmt cpc cpe cpf cpm cpp cpr cpt crc cre crf crm crp crr crt ctc cte ctf ctm ctp ctr ctt ec- ecc ece ecf ecm ecr ect eec eee eef eem eep eer eet ef- efc efe eff efm efp efr eft em- emc eme emf emm emp emr emt ep- epc epe epf epm epp epr ept erc ere erf erm erp err ert etc ete etf etm etp etr ett fcc fce fcf fcm fcp fcr fct fec fee fef fem fep fer fet ffc ffe fff ffm ffp ffr fft fmc fme fmf fmm fmp fmr fmt fpc fpe fpm fpp fpr fpt frc fre frf frm frp frr frt ftc fte ftf ftm ftp ftr ftt m-f m-r mc- mcc mce mcf mcm mcp mcr mct mec mee mef mem mep mer met mfc mfe mff mfm mfp mfr mft mmc mme mmf mmm mmp mmr mmt mpc mpe mpf mpm mpp mpr mpt mrc mre mrf mrm mrp mrr mrt mtc mte mtf mtm mtp mtr mtt p-p pcc pce pcf pcm pcp pcr pct pec pee pef pem pep per pet pfc pfe pff pfm pfp pfr pft pmc pme pmf pmm pmp pmr pmt ppc ppe ppf ppm ppp ppr ppt prc pre prf prm prp prr prt pt- ptc pte ptf ptm ptp ptr ptt rcc rce rcf rcm rcp rcr rct re- rec ree ref rem rep rer ret rfc rfe rff rfm rfp rfr rft rmc rme rmf rmm rmp rmr rmt rpc rpe rpf rpm rpp rpr rpt rrc rrf rrm rrp rrr rrt rtc rte rtf rtm rtp rtr rtt tcc tce tcf tcm tcp tcr tct te- tec tee tef tem tep ter tet tfc tfe tff tfm tfp tfr tft tmc tme tmf tmm tmp tmr tmt tpc tpe tpf tpm tpp tpr tpt trc tre trf trm trp trr trt ttc tte ttf ttm ttp ttr ttt