-tree c-p-c c-tec ccccc ccell ccett cclef ccrcl ccrel cctrl ceele ceere celer cell- celle celte cepet cerc- cerce cerec cerer ceret cerre certe cette cfler clcff cleef cleer cleet clefe cleft clepe clept clerc clere clete clett cpcfc cpctc crece creel creep creer creft crele crell crepe crept crete crrel ctcfl cteep ctree ctrlc cttee eccle ectfe eeeee eeler eepee efere efetf effer effet eftel efter elect eleet elele ellel eller ellet elpee elper elrec eperc eptfe erect erept erere erpel erte ertel erter etete etree ettel etter ettle fclef feele feere felce felet felle felte feltt ferce ferel feret ferle ferr- ferre ferte fetel feter fette flect fleer fleet flere flert flete flett frcpc freel freep freer freet frere frett ftlee ftrtt lecce leece leell leere leert leffe lelep lelle lepel leper lepet leppe lepre lept- lerer letre lette p-rep pcell pcept pcert pctct pecel peece peele peell peere peerl peert peete pelee peler pelet pelle pepee pepel peple peppe pept- perce perec perel perer peret perle perre perte peter petr- petre pette pleep pleet plete prece preef preff prell prelp prepl prete pter- ptere ptprc ptpre ptprf ptprr ptprt recce recep recet recpt rect- recte reece reefe reeft reepe reere refel refer refet reffe relee relet relte repec repel repet reple reppe reprt rere- reree reret retee retel reter rette rperf tcell teele teell teepe tefe telce tele- telec telep teler tell- telle tepee tepet terce teret terre tert- tetel teter tetle tetr- tette tlell tlett tpler treer treet trefe treff trele trepp trept trere trete trett ttttt