-tree c-cor c-tec ccccc ccett ceco- ceere ceoce ceoor cerc- cerce cerco cerec cerej cerer ceret cerje cero- ceroc cerre cerro certe ceto- cette co-co cocc- cocce cocco coceo cocto coete cojoc cooee cooer coore coote corce core- coree corer coro- corot corre corte corto coter cott- cotte cotto crece creer creo- creot crete croce croco crooe croot crore crote crott ctree cttee ecto- ector ectot eeeee eject eorre erect erere eroor erore eroto error erte erter etete etoro etree etter j-roc jeroo jerre jerte jetco jetee jeter jette jetto joe-e jooto joree jotto jrotc ocoee ocote ocree octet octo- octor oeco- oerje oo-er oocre ooooo orcet oreco oreo- orere orero oroco oroer orret orter ortet ortoo otere otero otoce ototo otter r-co- recce recco recet rect- recte recto reece reere rejto rere- reree reret retee reter retje retro rette retto ro-ro rocco rocor roero rooer roore roote rorer roter roto- rotor rotot rotte rotto rtejr teoco terce terco teret terje teror terre terro tert- teter tetr- tetro tette tjore tocco toco- toece toerr toeto toore torce toreo toret torje torre torro torte torto toter toto- totoe totoo totte treco treer treet trejo trere trete trett troco troee trott ttttt