-er eee eem eeo eer eet eex eie eii eim eio eir eit eix em- eme emi emm emo emr emt emx eo- eoe eoi eom eoo eor eot ere eri erm ero err ert ete eti etm eto etr ett etx ex- exe exi exo exr ext exx ie- iee iei iem ier iet iex iie iii iim iio iir iit iix im- ime imi imm imo imt imx io- ioe ioi iom ioo ior iot ir- ire iri irm iro irr irt irx ite iti itm ito itt itx ixe ixi m-o m-r mee mei mem meo mer met mex mi- mie mii mim mio mir mit mix mme mmi mmm mmo mmr mmt mmx moe moi mom moo mor mot mox mre mri mrm mro mrr mrt mrx mte mti mtm mto mtr mtt mtx mxi mxr o-i oee oei oem oeo oer oet oex oie oii oim oio oir oit om- ome omi omm omo omr omt omx oo- ooi oom ooo oor oot oox or- ore ori orm oro orr ort orx ot- ote oti otm oto otr ott ox- oxi oxo oxt oxx re- ree rei rem reo rer ret rex rie rii rim rio rir rit rix rme rmi rmm rmo rmr rmt rmx roe roi rom roo ror rot rox rri rrm rrr rrt rte rti rtm rto rtr rtt rtx rxr t-x te- tee tei tem teo ter tet tex tie tii tim tio tir tit tix tme tmi tmm tmo tmr tmt tmx to- toe toi tom too tor tot tox tre tri trm tro trr trt trx tte tti ttm tto ttr ttt ttx txe txi txt xee xem xer xet xex xie xii xio xit xix xmi xmm xmo xmr xmt xmx xoi xom xoo xor xot xox xrt xrx xti xtm xtr xtx xxi xxo xxx