-tree c-p-c c-tec ccccc cccii ccett ccifc cciii ccitt ceci- cecie cecri ceere ceipp ceirt cepci cepet cepic cepie cepii cerc- cerce cerci cerec cerer ceret ceric cerie cerre certe cetic cette cicer cietc cifer cifft cifte cipce ciper cippi cipre circe ciric cirie cirr- cirri citec citee citer citie citr- citte cpcfc cpctc cpeir crece creep creer creft crepe crept crete crice crier cripe cript cteep ctree ctrie ctrip cttee e-fit ecipe ecrit ectfe eeeee eepee eerie eetti efere eferi efetf effer effet effie efrei efter eipic eipri eirie eiter eitri eperc epice eppie eptfe erect erept 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 frcpc freei freep freer freet freir freit frere frett frice frier fripp frite fritt ftrtt ice-t iceci iceit icici icier icter ictic iecee ieiri iepe ieper ierei iette if-- ifere iffet ifrit ifttt iiiee iiiii iitti iperf ipeti ipiti ippee ippei ircii irece irete irite irrep irrit irtec itete itfet itfit itire itrip itter ittre ittti p-rep pcepi pcept pcert pci-e pctct peece peere peeri peert peete peice peire peirt pepee peppe peppi pept- perce perci perec perer peret peri- peric perie perit perre perri perte perti peter petie petit petr- petre petri pette petti picr- picti piece piere pieri piert piiri piper pipet pipit pippi pipri pirce piric pirie pirre pirri piter pitie pitip pitre pitri pitti prece preci preef preff preie preif prete preti price prief prier prife priit prite priti pritt pter- ptere pteri ptice ptprc ptpre ptprf ptprr ptprt rcirc recce recep recet recip recit recpt rect- recte recti reece reefe reeft reepe reere reeti refer refet reffe refit reice reiff repec repet repic repit reppe reprt rere- reree reret reric rerip rerir retee reter retie retip rette ri-fi ricci ricer riefe rieti rifer riife ripec riper ripit rippe ririe rperf rripe rtice tecic teepe tefe teffi tepee tepet tepic tepit terce teret terif terre terri tert- teter tetr- tetri tette ti-ti ticci ticer tieit tiere tieri tierp tiffe tiifp tiper tipet tipit tippi tiree tirer tiret tirit titcr titer titii titre titte titti tpcit treer treet trefe treff treie treif treip treit trepp trept trere treri trete trett trice triei trier triet trife triip tripe tripi tripp tript trit- trite tritt ttttt