-er eee eem eeo eer ees eet eex em- eme emm emo emr ems emt emu emx eo- eoe eom eoo eor eos eot eou ere erm ero err ers ert eru es- ese esm eso esr ess est esu esx ete etm eto etr ets ett etu etx eu- eue eur eus eut eux ex- exe exo exr exs ext exu exx m-o m-r mee mem meo mer mes met meu mex mme mmm mmo mmr mms mmt mmu mmx moe mom moo mor mos mot mou mox mre mrm mro mrr mrs mrt mru mrx mse msm mso msr mss mst msu msx mte mtm mto mtr mts mtt mtu mtx mue mum mur mus mut muu mux mxr mxs mxu oee oem oeo oer oes oet oex om- ome omm omo omr oms omt omu omx oo- oom ooo oor oos oot oox or- ore orm oro orr ors ort oru orx os- ose osm oso osr oss ost osu osx ot- ote otm oto otr ots ott otu ou- oue oum ouo our ous out ox- oxo oxt oxx re- ree rem reo rer res ret reu rex rme rmm rmo rmr rms rmt rmx roe rom roo ror ros rot rou rox rrm rrr rrs rrt rru rse rsm rso rsr rss rst rsu rsx rte rtm rto rtr rts rtt rtu rtx rue rum ruo rur rus rut ruu rux rxr rxs se- see sem seo ser ses set seu sex sme smm smo smr sms smt smu smx soe som soo sor sos sot sou sox sr- sre srm sro srr srs srt srx ss- sse ssm sso ssr sss sst ssu ssx ste stm sto str sts stt stu stx sue sum suo sur sus sut suu sux sxm sxs sxt sxu t-x te- tee tem teo ter tes tet teu tex tme tmm tmo tmr tms tmt tmu tmx to- toe tom too tor tos tot tou tox tre trm tro trr trs trt tru trx tse tsm tso tsr tss tst tsu tsx tte ttm tto ttr tts ttt ttu ttx tue tum tuo tur tus tut tuu tux txe txs txt txu uee uem uer ues uet um- ume umm umo umr ums umt umu uoe uom uoo uor uos uot uox ur- ure urm uro urr urs urt uru urx use usm uso usr uss ust usu usx ute utm uto utr uts utt utu utx uue uum uur uus uut uuu uxo uxr uxt uxu xee xem xer xes xet xeu xex xmm xmo xmr xms xmt xmu xmx xom xoo xor xos xot xox xrt xrx xsm xss xst xtm xtr xts xtx xue xus xxo xxx