-er eee eem eeo eep eer eet eie eii eim eio eip eir eit em- eme emi emm emo emp emr emt eo- eoe eoi eom eoo eop eor eot ep- epe epi epm epo epp epr ept ere eri erm ero erp err ert ete eti etm eto etp etr ett ie- iee iei iem iep ier iet iie iii iim iio iip iir iit im- ime imi imm imo imp imt io- ioe ioi iom ioo iop ior iot ipe ipi ipm ipo ipp ipr ipt ir- ire iri irm iro irp irr irt ite iti itm ito itp itt m-o m-r mee mei mem meo mep mer met mi- mie mii mim mio mip mir mit mme mmi mmm mmo mmp mmr mmt moe moi mom moo mop mor mot mpe mpi mpm mpo mpp mpr mpt mre mri mrm mro mrp mrr mrt mte mti mtm mto mtp mtr mtt o-i oee oei oem oeo oep oer oet oie oii oim oio oip oir oit om- ome omi omm omo omp omr omt oo- ooi oom ooo oop oor oot op- ope opi opm opo opp opr opt or- ore ori orm oro orp orr ort ot- ote oti otm oto otp otr ott p-p pee pei pem peo pep per pet pie pii pim pio pip pir pit pme pmi pmm pmo pmp pmr pmt poe poi pom poo pop por pot ppe ppi ppm ppo ppp ppr ppt pre pri prm pro prp prr prt pt- pte pti ptm pto ptp ptr ptt re- ree rei rem reo rep rer ret rie rii rim rio rip rir rit rme rmi rmm rmo rmp rmr rmt roe roi rom roo rop ror rot rpe rpi rpm rpo rpp rpr rpt rri rrm rrp rrr rrt rte rti rtm rto rtp rtr rtt te- tee tei tem teo tep ter tet tie tii tim tio tip tir tit tme tmi tmm tmo tmp tmr tmt to- toe toi tom too top tor tot tpe tpi tpm tpo tpp tpr tpt tre tri trm tro trp trr trt tte tti ttm tto ttp ttr ttt