-ol eee eef eel eem eeo eet eex ef- efe eff efl efm efo eft efx ele elf ell elm elo elt elx em- eme emf eml emm emo emt emx eo- eoe eof eol eom eoo eot ete etf etl etm eto ett etx ex- exe exl exo ext exx fee fef fel fem feo fet fex ffe fff ffl ffm ffo fft ffx fle flf fll flm flo flt flx fme fmf fml fmm fmo fmt fmx foe fof fol fom foo fot fox fte ftf ftl ftm fto ftt ftx fxe fxm fxt fxx lee lef lel lem leo let lex lfe lff lfl lfm lfo lft lfx lle llf lll llm llo llt lme lmf lml lmm lmo lmt loe lof lol lom loo lot lox lte ltf ltl ltm lto ltt ltx lxo lxx m-f m-o mee mef mel mem meo met mex mfe mff mfl mfm mfo mft mle mlf mll mlm mlo mlt mlx mme mmf mml mmm mmo mmt mmx moe mof mol mom moo mot mox mte mtf mtl mtm mto mtt mtx mxl oee oef oel oem oeo oet oex of- ofe off ofl ofm ofo oft ofx ole olf oll olm olo olt om- ome omf oml omm omo omt omx oo- oof ool oom ooo oot oox ot- ote otf otl otm oto ott ox- oxf oxo oxt oxx t-x te- tee tef tel tem teo tet tex tfe tff tfl tfm tfo tft tfx tle tlf tll tlm tlo tlt tlx tme tmf tml tmm tmo tmt tmx to- toe tof tol tom too tot tox tte ttf ttl ttm tto ttt ttx txe txf txl txt xee xel xem xet xex xfe xfl xfm xft xfx xlf xlm xlt xmf xml xmm xmo xmt xmx xof xom xoo xot xox xtf xtm xtx xxl xxo xxx