-tree c-cor c-tec ccccc ccell ccett ccrcl ccrel cctrl ceco- ceele ceelo ceere celco celer cell- celle cello celo- celte ceoce ceoor ceorl cerc- cerce cerco cerec cerer ceret cero- ceroc cerre cerro certe ceto- cette cleco cleer cleet clerc clere clete cleto clett cloor cloot clore clort clote co-co cocc- cocce cocco coceo cocle cocol cocto coel- coelo coete cole- colee colel coleo coler colet coll- colle collo colo- color colre cooee cooer coole coolo coore coote corce core- coree corel corer coro- corol corot corre corrl corte corto cotel coter cotle cott- cotte cotto crece creel creer crele crell creo- creot crete croce croco croll crooe crool croot crore crote crott crrel ctree ctrlc ctrol cttee eccle ecole ecolo ecto- ector ectot eeeee eelco eeler elcor elcot elect eleet elele eleo- eleot ellel eller ellet elloe eloee elole eloor elore eloro elote elrec eltro eorre ercol erect erere eroor erore eroto errol error erte ertel erter etete etoll etool etoro etree ettel etter ettle lecce lecco leece leeco leell leere leert lelle lerer leroc lerot letot letre lette letto loco- locro loler lollo lolol looce looer loore loote lorel loreo lorer loret lorre lotec lotor lotte lotto ltcol ocelo ocllo ocoee ocote ocree octet octo- octol octor oeco- oelet oerel oerle oleo- olere olleo oller oltet oltre oo-er oocre ooooo orcet oreco orell oreo- orere orero orlec orlet oroco oroer orret orter ortet ortoo otell otelo otere otero otoce otole otolo ototo otter r-co- rcolo recce recco recet rect- recte recto reece reere relee relet rello relot relte rere- reree reret retee retel reter retro rette retto ro-ro rocco rocor roell roero roleo rollc rolle rollo rooer roole roore roote rorer rotel roter rotle roto- rotol rotor rotot rotte rotto tcell teele teell telce telco tele- telec teleo teler tell- telle tello telo- teoco teolo teotl terce terco teret teror terre terro tert- tetel teter tetle tetr- tetro tette tlell tlett tocco toco- toece toerr toeto toler tolet tolle tollo toloo tolor toole toolt toore torce torel toreo toret torre torro torte torto totel toter totle toto- totoe totoo totte treco treer treet trele trere trete trett troco troee troll trott ttttt