exec exen exer exes expn expr expt exrx exte extr exts n-up nccc nccn nccp nccr nccs ncct nccu ncec ncee ncen ncep ncer nces ncnc ncpc ncrc ncre ncrp ncsc ncse ncss ncst nctc ncte nctr ncue necc nece necr necs nect neen neep neer nees neet nene nens nent nenu nepc nepe nepr neps nept nerc nere nerr ners nert neru nesc nese nesn nesr ness nest net- nete nets nett neuc neue neun neur neut neuu nexe next nexx nnes nnnn nnpr nnss nntn npcc npes nppc nprt npss nptc npte nptn nrcs nren nrpc nrpn nrps nrrc nrsc nrsp nrts nscc nscs nsec nsep nser nsnr nspc nsps nsrc nssc nsse nssp nssr nsss nstc nstp nsts nstu ntcc nter ntes nteu ntnu ntpc ntrc ntru ntsc ntss ntsu nttr ntuc nuce nucs nucu nuee nuer nunc nune nunn nuns nunt nupe nups nurc nure nurn nurp nurr nurs nurt nuru nuse nuss nust nusu nute nuts nutt nutu pccc pcce pccs pcep pcer pcns pcnt pcnx pcpn pcpp pcps pcrc pcre pcse pcte pcts pcun pece pecr pecs pect peec peen peep peer pees peet pen- penc pene penn pens pent penu pepe peps per- perc pere pern perp perr pers pert peru pese pess pest pesu pete petn petr pets pett peun peur peut pnec pnes pnet pneu pnpp pnsc pntr pnup pnxt ppcc ppcs ppen pper pppn pppp ppps pprc ppru ppss pptn ppts pptt ppur prcc prcp prcs pre- prec pree pren prep pres pret preu prex prnp prps prrs prsc prse prss prtc prtp prtr prue prus prut pruu pscu psec psnc psnr pspp pspr psps psrp pssc psse psst psts pstu ptcc pten pter pttc pu-e puce puer puet pueu punc pune puns punt punu punx pupe pups pupu pur- pure purp purr purs puru puss pust put- pute puts putt putu puuc puxe pxes rccc rccs rcep rcet rcnr rcps rcpt rcsc rcss rctc rcts recc rece recp recr recs rect recu reen reep rees reet rene renn rens rent renu repe repp repr reps rept repu rere rers rert reru rese resn resp ress rest rete retr rets rett reue reup reus reut reuu reux rexx rncp rncs rnnt rnsp rntp rnut rpcs rpet rppn rpps rptn rpts rrrr rrsp rrun rscc rscn rscs rsee rsnn rsnr rsps rsre rstp rsts rstu rtcc rtce rtee rtes rtex rtns rtps rtss rttp rtts ruce ruct ruen ruer rues ruet runc rune runn runs runt rupe rupp rupt rurc rure rurp rurs ruru ruse russ rust rusu rute ruts rutt rutu ruun rxes sccc scce sccp sccs scct scec scee scep scer scet scnr scnt scpe scps scpt scr- scrc scre scrn scrs scsc scsn scsr scst scsu sctc sctn sctr scts scun scup scur scut se-c se-e se-n se-s se-t se-u se-x sec- secc sece secn secr secs sect secu seec seen seep seer sees seet seeu seex sene senn senr sens sent sepe sepn sepp sepr seps sept sepu sepx serc sere sern serp serr sers sert seru sesc sese sess sest set- setc sete sets sett setx seur seux sex- sexe sexp sext sncc sncp snee snep sner snes snet snns snpp snrs snte sntr snur snus spcc spcs spec spee spen sper spes spet spex spne spns spps sprs spse spsp spss spst sptc sptr spts spue spun spur spus sput srcc srct srec sres srnn srpc srps srpt srpx srsp srtp srtr sscc ssce sscp sscs ssec ssee ssep sses sset ssex ssns sspc sspe ssps sspt sspx ssrc ssrs sssc ssss sstc sstp ssts stcc stcp stcs stcu stec stee sten step ster stes stet stex stnn stnr stns stpp stps strc stre strn strs stru stss sttc sttr stuc stue stun stup stur stus stut stux suc- succ sucr sucs suee suen suer sues suet sueu sun- sune sunn suns sunt sunu sup- supe supp supr sups supt sur- surc sure surn surp surr surs surt suru sus- suse susp suss sust susu sute sutu suus sux- suxe suxt tccc tccu tcep tcnn tctc tcts tecr tecs tect teec teen teer tees teet tenc tene tenn tenp tens tent tenu tepe tepp tepu ter- terc tere tern terp terr ters teru tesc tese tesp tess test tete tetr tets tett tetu tetx teut text tncc tnes tnsp tnts tnut tpcp tpcs tper tppp tppr tprs tpsc tpte tptp tptr tput trcc tre- trec tree tren tres tret treu trex trpc trpe trpn trpp trps trst trtc trte trtr truc true trun trus trut truu trux tscc tscp tsec tsen tses tset tspn tsps tspt tsse tssr tsst tstc tsts tsun tsup ttcn ttcp tten tter ttss tttt tucc tuen tuer tues tuet tunc tune tunn tuns tunu tupe tups tupu turc ture turn turp turr turs turt turu tusc tuss tust tute tuts tutt tutu tuxs txcn txen txtr u-rp uccp uces ucrc ucsc ucst ucsu ucut uers uesn uess uext uncc unce uncp uncs unct unec unee unen uner unes unne unns unpc unps unrs uns- unsc unst unte unts unus unut upcs upen upne upnp uppc uppe uppp uppu upsc upse upup ure- ures uret urex urne urns urre urse urss ursu urte urts urun urup urur urus urut uscc usce uscs usee usen user uses uset usnc usnr usnu uspc uspp usps ussc usse ussr usss usst ussu ustc uste ustp usts usun usus utec utep uter utes utne utsc uttu uucp uuen uuuu uxue uxus xces xeer xen- xene xenn xenu xer- xers xert xeus xexe xnee xnet xpcc xper xrep xsun xsup xtep xtsr xurs xuxu xxxx

-tree c-p-c c-tec ccccc ccett ccnet ccups cecun ceene ceere ceese cence ceneu cenex cenpn cenpt cense cent- centr cents cepes cepet cerc- cerce cercs cerec ceren cerer ceres ceret cerne cerps cerre cerrs cerse cerss certe certs cerus cesce cescr cesen cesse ceste cests cesun ceten cetes cette cetun cetus cneru cnnnn cntrc cpctc cpesc crece creen creep creer crees