-er -ey eee eem eeo eer eet eex eey em- eme emm emo emr emt emx eo- eoe eom eoo eor eot ere erm ero err ert ery ete etm eto etr ett etx ety ex- exe exo exr ext exx exy eye eym eyo eyr eyt m-o m-r mee mem meo mer met mex mey mme mmm mmo mmr mmt mmx moe mom moo mor mot mox moy mre mrm mro mrr mrt mrx mry mte mtm mto mtr mtt mtx mxr my- mye mym myo myr myt myx oee oem oeo oer oet oex oey om- ome omm omo omr omt omx omy oo- oom ooo oor oot oox or- ore orm oro orr ort orx ory ot- ote otm oto otr ott ox- oxo oxt oxx oxy oye oyo re- ree rem reo rer ret rex rey rme rmm rmo rmr rmt rmx roe rom roo ror rot rox roy rrm rrr rrt rte rtm rto rtr rtt rtx rty rxr ry- rye rym ryo ryr ryy t-x te- tee tem teo ter tet tex tey tme tmm tmo tmr tmt tmx tmy to- toe tom too tor tot tox toy tre trm tro trr trt trx try tte ttm tto ttr ttt ttx tty txe txt tye tym tyo tyr tyt xee xem xer xet xex xmm xmo xmr xmt xmx xom xoo xor xot xox xrt xrx xry xtm xtr xtx xty xxo xxx xxy xyr xyy yee yem yeo yer yet yex yey yme ymm ymo ymt yoe yom yoo yor yot yox yoy yre yro yrt yte ytm yto ytr ytt yxe yxy yye yyt yyy