-er eee eem eeo eer ees eet em- eme emm emo emr ems emt eo- eoe eom eoo eor eos eot ere erm ero err ers ert es- ese esm eso esr ess est ete etm eto etr ets ett m-o m-r mee mem meo mer mes met mme mmm mmo mmr mms mmt moe mom moo mor mos mot mre mrm mro mrr mrs mrt mse msm mso msr mss mst mte mtm mto mtr mts mtt oee oem oeo oer oes oet om- ome omm omo omr oms omt oo- oom ooo oor oos oot or- ore orm oro orr ors ort os- ose osm oso osr oss ost ot- ote otm oto otr ots ott re- ree rem reo rer res ret rme rmm rmo rmr rms rmt roe rom roo ror ros rot rrm rrr rrs rrt rse rsm rso rsr rss rst rte rtm rto rtr rts rtt se- see sem seo ser ses set sme smm smo smr sms smt soe som soo sor sos sot sr- sre srm sro srr srs srt ss- sse ssm sso ssr sss sst ste stm sto str sts stt te- tee tem teo ter tes tet tme tmm tmo tmr tms tmt to- toe tom too tor tos tot tre trm tro trr trs trt tse tsm tso tsr tss tst tte ttm tto ttr tts ttt