-tree bbbee bcell be-er bebel beber becel becue becut beebe beeft beele beete beeut beffe befur belce belec belee belef belet bellb belle belue belur belut berbe bercu berec berel beret berle berre berru berte betee betel beter betle betre bett- bette betul beuer beule beure beute bleer bleet bleft blere blete bleue bluer bluet bluff blufr bluft blurb blure blurr blurt brebu brece breef breel breer breet brell brere brett breu- brrrr bruce bruer bruet bruff brule brull brute btc-e btr-t bubbe buber buble bucet bucur buell bufet buffe bufle bulb- bull- bulle bulul bulut burcu burel buret burle burru burte burtt buruc burut butec buter butle butte butut c-tec cbeff cbeft cblue ccccc ccell ccett cclef ccrcl ccrel cctrl cebec ceber ceele ceere cefcu celeb celer cell- celle celte cerbu cerc- cerce cerec cerer ceret cerre certe cette cfler cfu-e clcff cleef cleer cleet clefe cleft clerc clere clete clett clubb clue- cluer clufe cluff clurr clute clutt crebe crece creel creer creft crele crell crete cretu creu- creue creul crrel cruce cruel cruet crufe cruft crule crull crure ctcfl ctree ctrlc cttee ctulu cubbe cubeb cubel cuber cubub cufeu cuffe cufre culbe culet culle cullu culur curce curel curer curet curle curll curlu curre cutcu cutee cuter cutle cuuel ebber ebbet ebble ebell eberl ebert eblul ebull ebure eccle ectfe eeeee eeler ef-tu efere efetf effer effet eftel efter efuru efutu elect eleet elele eleut ellel eller ellet ellul elrec elulu eluru elute erbbe erber erect erere errtu erte ertel erter eruct etete etree ettel etter ettle eturu eucre euell euler eurel eurre fclef febel feble febre feele feere felce felet felle felte feltt ferce ferel feret ferle ferr- ferre ferte fetel feter fette feuer feule feute flect fleer fleet flere flert flete flett fleur fluce fluff flurb flure flurr flurt flute freel freer freet frere frett freur fruct frute ft-lb ftlee ftrtt fu-fu fulbe fulle fullf furel futur lebce lebec lebel leber lebet lecce leece leell leere leert lefeu leffe leftb leful leleu lelle lerer letbe letre lette letur leuc- leuce lubbe luber luble lubur lucee lucet lucre lucur lufre lufte lulec lulle lulte luluc lulul lurer lurue lute- luter lutte rebbe rebec rebel reber rebet rebut recce recet rect- recte recue recur recut reece reefe reeft reere refel refer refet reffe refut relee relet relte relue rere- reree reret retee retel reter rette reuel reuer reuet reule reute rubee rubel ruber ruble rucer rucul ruele ruell ruere ruete ruffe ruler rurec ruter rutle rutte rutul ruule ruutu tbtbt tbutt tcell teber tebet tectb tecul teele teell tefe telce tele- telec teler teleu tell- telle terce teret tereu terre tert- tetel teter tetle tetr- tette tlell tlett tllbr treer treet trefe treff trele trere trete trett treut trubu truce truel truer truff trule trull trute ttttt tuber tubul tucet tuctu tuelf tuell tuelt tuffe tufte tulce tulet tulle turbe turbt turel turet turle turre turtu turul turut tutee tutel tutle tutte tuuru u-cee ubble uber- uccel uccle ucell uclue uelfe ufere ulcer ullet ullur ultre ululu uluru urcel urelu urtel urter urtlu urubu uruce urucu urutu uter- utter uttur utube uturu uuuuu