-er eee eem eep eer ees eet eie eii eim eip eir eis eit em- eme emi emm emp emr ems emt ep- epe epi epm epp epr eps ept ere eri erm erp err ers ert es- ese esi esm esp esr ess est ete eti etm etp etr ets ett ie- iee iei iem iep ier ies iet iie iii iim iip iir iis iit im- ime imi imm imp ims imt ipe ipi ipm ipp ipr ips ipt ir- ire iri irm irp irr irs irt is- ise isi ism isp isr iss ist ite iti itm itp its itt m-r mee mei mem mep mer mes met mi- mie mii mim mip mir mis mit mme mmi mmm mmp mmr mms mmt mpe mpi mpm mpp mpr mps mpt mre mri mrm mrp mrr mrs mrt mse msi msm msp msr mss mst mte mti mtm mtp mtr mts mtt p-p pee pei pem pep per pes pet pie pii pim pip pir pis pit pme pmi pmm pmp pmr pms pmt ppe ppi ppm ppp ppr pps ppt pre pri prm prp prr prs prt ps- pse psi psm psp psr pss pst pt- pte pti ptm ptp ptr pts ptt re- ree rei rem rep rer res ret rie rii rim rip rir ris rit rme rmi rmm rmp rmr rms rmt rpe rpi rpm rpp rpr rps rpt rri rrm rrp rrr rrs rrt rse rsi rsm rsp rsr rss rst rte rti rtm rtp rtr rts rtt se- see sei sem sep ser ses set sie sii sim sip sir sis sit sme smi smm smp smr sms smt spe spi spm spp spr sps spt sr- sre sri srm srp srr srs srt ss- sse ssi ssm ssp ssr sss sst ste sti stm stp str sts stt te- tee tei tem tep ter tes tet tie tii tim tip tir tis tit tme tmi tmm tmp tmr tms tmt tpe tpi tpm tpp tpr tps tpt tre tri trm trp trr trs trt tse tsi tsm tsp tsr tss tst tte tti ttm ttp ttr tts ttt