eee eem eeo ees eex em- eme emm emo ems emu emx eo- eoe eom eoo eos eou es- ese esm eso ess esu esx eu- eue eus eux ex- exe exo exs exu exx m-o mee mem meo mes meu mex mme mmm mmo mms mmu mmx moe mom moo mos mou mox mse msm mso mss msu msx mue mum mus muu mux mxs mxu oee oem oeo oes oex om- ome omm omo oms omu omx oo- oom ooo oos oox os- ose osm oso oss osu osx ou- oue oum ouo ous ox- oxo oxx se- see sem seo ses seu sex sme smm smo sms smu smx soe som soo sos sou sox ss- sse ssm sso sss ssu ssx sue sum suo sus suu sux sxm sxs sxu uee uem ues um- ume umm umo ums umu uoe uom uoo uos uox use usm uso uss usu usx uue uum uus uuu uxo uxu xee xem xes xeu xex xmm xmo xms xmu xmx xom xoo xos xox xsm xss xue xus xxo xxx