prel pren prep pret preu prle prlr prnp pro- proc proe prol pron proo prop prot prou prtc prtp prtr prue prut pruu ptcc ptcl pten pter ptol ptop pttc pu-e puce puel pueo puer puet pueu pule pull pulo pulp pult pulu punc pune puno punt punu pupe pupl pupu pur- pure purl puro purp purr puru put- pute puto putt putu puuc rccc rcep rcet rcle rcnl rcnr rcon rcpo rcpt rctc recc rece recp recr rect recu reel reen reep reet rele rell relo relp relt rene renn reno rent renu reol reop reot reou repe repl repo repp repr rept repu rere rero rert reru rete reto retr rett reue reul reup reut reuu rlee rleu rnco rncp rnnt rnot rntp rnut rocc roce roco roel roen roer roet role roll rolo rolp rolt ronc rone rono ront rool roon roop roor root rope ropo rorc rore roro rort roru rotc rote rotl rotn roto rotr rott roue roul roun roup rout rpet rpoe rpon rppn rptn rrle rrrr rrun rtcc rtce rtee rtle rtlt rttp ruce ruct ruel ruen ruer ruet rule rull rulo runc rune runn runo runt rupe rupp rupt rurc rure ruro rurp ruru rute rutl ruto rutt rutu ruun tccc tccu tcep tcnn tcon tcpo tctc tcul tecl teco tecr tect teec teel teen teer teet tel- telc tele tell teln telo telt telu tenc tene tenn teno tenp tent tenu teon teor tepe tepp tepu ter- terc tere tern tero terp terr teru tete teto tetr tett tetu teut tlco tlen tlon tncc tnut toce toco toee toen toer toet tol- tole toll tolo tolt tolu tone tonn tono tonu tool toon toor toot top- tope topo topp topt topu torc tore torn toro torp torr tort toru totc tote toto totr tott toul toun toup tour tout tpcp tper tpol tpon tppp tppr tpte tptp tptr tput trcc trcl tre- trec tree tren treo tret treu trno troc troe tron troo trop trot trou trpc trpe trpn trpp trtc trte trtr truc true trun trut truu ttcn ttcp tten tteo tter ttoe tton ttop tttt ttul tucc tuco tuel tuen tuer tuet tule tull tulo tulp tulu tunc tune tunn tuno tunu tuor tupe tupo tupu turc ture turn turo turp turr turt turu tute tutl tuto tutt tutu tuuo u-rp uccp ucel ucon ucrc ucut uele uell ueno ulcc ulco ulee ulen uleo ulle ullo ullr ulne ulno ulo- uloc ulto ultt ulul uncc unce uncl unco uncp unct unec unee unen uner unle unlp unne unno unon unop unpc unro unte unto unut uocc uolc uone uor- uore upen uplo upne upnp upon upor uppc uppe uppp uppu uptl upto upup ure- uret urle urne uro- urol uroo urpo urre urte urun urup urur urut utec utel utep uter utne utor utto uttu uucp uuen uulu uuno uuoc uuuu