-er c-- ccc cce ccm ccp ccr ccs cct ce- cec cee cem cep cer ces cet cmc cme cmm cmp cmr cms cmt cpc cpe cpm cpp cpr cps cpt crc cre crm crp crr crs crt csc cse csm csp csr css cst ctc cte ctm ctp ctr cts ctt ec- ecc ece ecm ecr ecs ect eec eee eem eep eer ees eet em- emc eme emm emp emr ems emt ep- epc epe epm epp epr eps ept erc ere erm erp err ers ert es- esc ese esm esp esr ess est etc ete etm etp etr ets ett m-r mc- mcc mce mcm mcp mcr mcs mct mec mee mem mep mer mes met mmc mme mmm mmp mmr mms mmt mpc mpe mpm mpp mpr mps mpt mrc mre mrm mrp mrr mrs mrt msc mse msm msp msr mss mst mtc mte mtm mtp mtr mts mtt p-p pcc pce pcm pcp pcr pcs pct pec pee pem pep per pes pet pmc pme pmm pmp pmr pms pmt ppc ppe ppm ppp ppr pps ppt prc pre prm prp prr prs prt ps- psc pse psm psp psr pss pst pt- ptc pte ptm ptp ptr pts ptt rcc rce rcm rcp rcr rcs rct re- rec ree rem rep rer res ret rmc rme rmm rmp rmr rms rmt rpc rpe rpm rpp rpr rps rpt rrc rrm rrp rrr rrs rrt rsc rse rsm rsp rsr rss rst rtc rte rtm rtp rtr rts rtt scc sce scm scp scr scs sct se- sec see sem sep ser ses set smc sme smm smp smr sms smt spc spe spm spp spr sps spt sr- src sre srm srp srr srs srt ss- ssc sse ssm ssp ssr sss sst stc ste stm stp str sts stt tcc tce tcm tcp tcr tcs tct te- tec tee tem tep ter tes tet tmc tme tmm tmp tmr tms tmt tpc tpe tpm tpp tpr tps tpt trc tre trm trp trr trs trt tsc tse tsm tsp tsr tss tst ttc tte ttm ttp ttr tts ttt