-ol eee eel eeo eep eet eex ele ell elo elp elt elx eo- eoe eol eoo eop eot ep- epe epl epo epp ept epx ete etl eto etp ett etx ex- exe exl exo exp ext exx l-p lee lel leo lep let lex lle lll llo llp llt loe lol loo lop lot lox lpe lpl lpo lpp lpt lpx lte ltl lto ltp ltt ltx lxo lxx oee oel oeo oep oet oex ole oll olo olp olt oo- ool ooo oop oot oox op- ope opl opo opp opt opx ot- ote otl oto otp ott ox- oxo oxt oxx p-p pee pel peo pep pet pex ple pll plo plp plt plx poe pol poo pop pot pox ppe ppl ppo ppp ppt ppx pt- pte ptl pto ptp ptt ptx pxe pxl pxt t-x te- tee tel teo tep tet tex tle tll tlo tlp tlt tlx to- toe tol too top tot tox tpe tpl tpo tpp tpt tpx tte ttl tto ttp ttt ttx txe txl txt xee xel xep xet xex xlt xoo xop xot xox xpe xpl xpo xpp xpt xtp xtx xxl xxo xxp xxx