-tree c-tec ccccc cccii ccett ccifc cciii ccitt ceci- cecie cecri ceere ceirt cerc- cerce cerci cerec cerer ceret ceric cerie cerre certe cetic cette cicer cietc cifer cifft cifte circe ciric cirie cirr- cirri citec citee citer citie citr- citte crece creer creft crete crice crier ctree ctrie cttee e-fit ecrit ectfe eeeee eerie eetti efere eferi efetf effer effet effie efrei efter eirie eiter eitri erect erere erice erier eriff eriic erite erte erter etete etite etree etter ettie fecit feere feier ferce feret feric ferie ferit ferr- ferre ferri ferte feter feti- fetii fetir fette fieee fieri fifer fifie firee firei firer firie firit firre fitit fitri fitte freei freer freet freir freit frere frett frice frier frite fritt ftrtt ice-t iceci iceit icici icier icter ictic iecee ieiri ierei iette if-- ifere iffet ifrit ifttt iiiee iiiii iitti ircii irece irete irite irrit irtec itete itfet itfit itire itter ittre ittti rcirc recce recet recit rect- recte recti reece reefe reeft reere reeti refer refet reffe refit reice reiff rere- reree reret reric rerir retee reter retie rette ri-fi ricci ricer riefe rieti rifer riife ririe rtice tecic tefe teffi terce teret terif terre terri tert- teter tetr- tetri tette ti-ti ticci ticer tieit tiere tieri tiffe tiree tirer tiret tirit titcr titer titii titre titte titti treer treet trefe treff treie treif treit trere treri trete trett trice triei trier triet trife trit- trite tritt ttttt