-er eee eem eep eer eet eie eii eim eip eir eit em- eme emi emm emp emr emt ep- epe epi epm epp epr ept ere eri erm erp err ert ete eti etm etp etr ett ie- iee iei iem iep ier iet iie iii iim iip iir iit im- ime imi imm imp imt ipe ipi ipm ipp ipr ipt ir- ire iri irm irp irr irt ite iti itm itp itt m-r mee mei mem mep mer met mi- mie mii mim mip mir mit mme mmi mmm mmp mmr mmt mpe mpi mpm mpp mpr mpt mre mri mrm mrp mrr mrt mte mti mtm mtp mtr mtt p-p pee pei pem pep per pet pie pii pim pip pir pit pme pmi pmm pmp pmr pmt ppe ppi ppm ppp ppr ppt pre pri prm prp prr prt pt- pte pti ptm ptp ptr ptt re- ree rei rem rep rer ret rie rii rim rip rir rit rme rmi rmm rmp rmr rmt rpe rpi rpm rpp rpr rpt rri rrm rrp rrr rrt rte rti rtm rtp rtr rtt te- tee tei tem tep ter tet tie tii tim tip tir tit tme tmi tmm tmp tmr tmt tpe tpi tpm tpp tpr tpt tre tri trm trp trr trt tte tti ttm ttp ttr ttt