eeee eele eero eete eext elee eleo eler elet elex elle ello elro elte elto eole eolo eore eorl eoto er-x erel erer eret erle erll eroe erol eroo erre erro ertl etee etel eter etoe etox etre etro ette etto exel exer exo- exor exrx exte extl extr leel leer leet lele lell lelo leor leox lere lero lert lete leto lett lext lexx llet llll lloo lole loll lolo looe lool loor loot lore loro lote lotl loto lotr lott lox- loxo lrrr ltee lttr lxxx o-eo oele oere ole- oleo oler olet olle ollo olor olot ooer oolo oooo oore oort ore- orel oreo orer orex orle orlo oro- oroe oror orot orro orte orto otee oter oto- otoe otoo otor otre otro otte otto oxer oxo- oxox oxxo reel reet rele rell relo relt reol reot rere rero rert rete reto retr rett rexx rlee roel roer roet role roll rolo rolt rool roor root roox rore roro rort rote rotl roto rotr rott roxo rrle rrrr rtee rtex rtle rtlt teel teer teet tel- tele tell telo telt teor ter- tere tero terr tete teto tetr tett tetx text tltx toee toer toet tol- tole toll tolo tolt tool toor toot tore toro torr tort torx tote toto totr tott tox- toxo toxt tre- tree treo tret trex troe troo trot trox trte trtr tteo tter ttoe tttt txtr xeer xer- xero xert xexe xlet xlox xolo xoro xote xoxo xtol xtro xxxo xxxx