-ol eee eef eel eeo eep eet eex ef- efe eff efl efo efp eft efx ele elf ell elo elp elt elx eo- eoe eof eol eoo eop eot ep- epe epf epl epo epp ept epx ete etf etl eto etp ett etx ex- exe exl exo exp ext exx fee fef fel feo fep fet fex ffe fff ffl ffo ffp fft ffx fle flf fll flo flp flt flx foe fof fol foo fop fot fox fpe fpl fpo fpp fpt fpx fte ftf ftl fto ftp ftt ftx fxe fxp fxt fxx l-p lee lef lel leo lep let lex lfe lff lfl lfo lfp lft lfx lle llf lll llo llp llt loe lof lol loo lop lot lox lpe lpf lpl lpo lpp lpt lpx lte ltf ltl lto ltp ltt ltx lxo lxx oee oef oel oeo oep oet oex of- ofe off ofl ofo ofp oft ofx ole olf oll olo olp olt oo- oof ool ooo oop oot oox op- ope opf opl opo opp opt opx ot- ote otf otl oto otp ott ox- oxf oxo oxt oxx p-p pee pef pel peo pep pet pex pfe pff pfl pfo pfp pft pfx ple plf pll plo plp plt plx poe pof pol poo pop pot pox ppe ppf ppl ppo ppp ppt ppx pt- pte ptf ptl pto ptp ptt ptx pxe pxl pxt t-x te- tee tef tel teo tep tet tex tfe tff tfl tfo tfp tft tfx tle tlf tll tlo tlp tlt tlx to- toe tof tol too top tot tox tpe tpf tpl tpo tpp tpt tpx tte ttf ttl tto ttp ttt ttx txe txf txl txt xee xel xep xet xex xfe xfl xft xfx xlf xlt xof xoo xop xot xox xpe xpf xpl xpo xpp xpt xtf xtp xtx xxl xxo xxp xxx