prot prow prtc prtp prtr ptcc pter ptop ptrf pttc rccc rcep rcet rcfc rcpo rcpt rctc rcwp recc rece recp recr rect reef reep reet refe reff refr reft reof reop reot repe repo repp repr rept rere rero rert rete reto retr rett rewe rfef rffc rftc rocc roce roco roer roet rofc rofe roff rofo roof roop roor root rope ropo rorc rore roro rort rotc rote roto rotr rott rowe rowf rowp rowr rowt roww rpet rpfc rpoe rpof rrfc rrrr rtcc rtce rtee rtfc rttp tccc tcep tcfc tcpo tctc teco tecr tect teec teef teer teet tefc teff teft teor teow tepe tepp ter- terc tere terf tero terp terr tete teto tetr tett tewo tfec tfot tfpt tftc tftp toce toco toee toer toet toff tofo toft toof toor toot top- tope topf topo topp topt torc tore torf toro torp torr tort totc tote toto totr tott towe tpcp tper tppp tppr tprw tpte tptp tptr trcc tre- trec tree tref treo tret trew trfc trfr troc troe troo trop trot trow trpc trpe trpp trtc trte trtr trwe ttcp tteo tter ttfc ttff ttoe ttop tttt twee twep twer two- twoc twof twoo twop twot twrp wccc wcce wccf wcco wccp wccr wcct wccw wcec wcee wcef wceo wcer wcet wcfc wcfo wcfr wcft wcfw wcoc wcoe wcoo wcop wcor wcot wcpc wcpe wcpo wcpp wcpr wcpt wcrc wcre wcro wcrp wcrr wcrt wcrw wctc wcte wctf wcto wctp wctr wctt wctw wcwc wcwf wcwp wecc wecf weco wecr wect wecw weec weef weeo weep weer weet wefc wefe weff wefr weft weop weow wepe wepp wepr wept wer- werc were werf wero werp werr wert werw wetc wete wetf weto wetr wett wewc wewe wewo wfcc wfcf wfco wfcr wfct wfer wffc wfff wfor wfot wfpc wfpf wfpt wfrc wfre wfrf wfro wfrp wfrw wftc wfte wftf wftr wftw wfwc wfwo wocc woce woco wocr woer wofc wofe woff wofr woft wooc woof woop woot woow wopc wopp worc wore worf woro worp worr wort worw wotc wote wotr wott wotw wowc wowe wowf wowo wowp wowt woww wpcc wpce wpcf wpcr wpct wpcw wpec wpeo wpep wper wpet wpfc wpff wpfo wpfp wpfr wpft wpfw wpoc wpop wpor wpot wpow wppc wppr wppt wpre wprf wpro wprp wprr wprt wptc wpte wptf wptr wptw wpwc wpwt wrce wrco wrcr wrct wrcw wrec wree wrer wret wrew wrfc wrfe wrff wrft wrfw wroc wroo wrop wrot wrow wrpp wrpr wrpw wrrc wrre wrro wrrw wrtc wrte wrto wrtp wrtr wrtw wrwc wrwr wtcc wtcf wtco wtcp wtcr wtct wtcw wtfc wtoc wtoe wtof wtor wtot wtow wtpr wtpt wtrc wtre wtro wtrp wtrt wtrw wttc wtte wttf wtto wttr wttt wttw wtwf wtwo wtwr wtwt wtww wwcf wwco wwcr wwct wwcw wwec wweo wwer wwet wwfc wwfe wwfp wwfr wwfw wwof wwor wwot wwow wwpc wwpr wwpt wwpw wwrc wwre wwrf wwrr wwrw wwtc wwtf wwtp wwtr wwtw wwwc wwwe wwwr wwww

-tree c-cor c-p-c c-pop c-tec ccccc ccett ceco- ceere cefor ceoce ceoor cepet cepot ceppo cerc- cerce cerco cerec cerer ceret cero- ceroc cerre cerro certe ceto- cette co-co co-op cocc- cocce cocco coceo cocow cocto coepe coete cofer coffe cofre cooee cooer coope coopt coore coote copce copec coper coppe coppo copr- copre copro copte copto corce core- coree corer corfe corfo coro- corop corot corpe corre corte corto coter cott- cotte cotto cowee cower cowff cowpe cowre cpcfc cpctc crece creep creer creft creo- creop creot crepe crept crete crewe croce croco croft crooe croop croot cropc crope cropo crore crote crott crowe crowp crwet cteep ctree cttee e-pro ecoff ecorp ectfe ecto- ector ectot eeeee eepee efere efetf effer effet efore efter eofor eorre epcot eperc epopt epote eptfe erect erept erere erewe eroor erore eroto errew error erte erter etete etoro etree etter etwee ewert ewfte feeor feere fefor feoff ferce feret ferow ferr- ferre ferro ferte feter feto- fetor fette fewer fewte focer foore foote force fore- foreo foret forow forro forte forto forwe fotte fower fowte fprot frcpc freep freer freet frere frett froop froot frore frote ftrtt fweep o-fer ocftc ocoee ocote ocree octet octo- octor oeco- oeppo offer offew offof offre offto offwe ofoto ofpop ofter oftwo oo-er oocre ooooo oowee opepe opere opper opter opto- optot optto orcet orcop oreco oreo- orere orero orfeo orfoe orfor oroco oroer orret orrow orter ortet ortoo ortwo orwoe otere otero otoce ototo otpor otter oweto owre- owte- owtte p-rep pcept pcert pctct pecco peece peere peert peete pepco pepee peppe pept- pepto perce perec perer peret perot perre perro perte perto petco peter petr- petre petro pette petto pewee pewet pewpe pewre pforp po-po pocop poete pooer poope poopo poore poort poote popco poper popet popop popow poppe poppo porco porec porer poret poro- porro porte porto potco potec potee poter potoc potof potoo potop potor potpe potro potte potto pow-r powce powee power powow powpe powre powte prece preco preef preff preop prete preto prewe proer profe proff proft proof proor proot prop- prope propp propr propt prore prot- proto prtor pter- ptere ptero ptprc ptpre ptprf ptpro ptprr ptprt pttow pweto r-co- recce recco recep recet recpt rect- recte recto reece reefe reeft reepe reere reewe refco refer refet reffe reffo reowe repco repec repet repew repop repor repot reppe repro reprt reprw rere- reree reret rerow retee reter retew retop retow retro rette retto rewer rewet ro-ro rocco rocor roero roewe roffe rofor rooer roofe rooft roope roore roote roper roppe rorer roter roto- rotor rotot rotte rotto rowce rower rowet rowfe rowff rowof rowte rowto rowwe rperf rprop rptor t-pop t-top teepe tefe teoco tepco tepee tepet tepor teppo terce terco teret teror terre terro tert- teter tetr- tetro tette tewer tewet tewor tocco toco- toece toeof toerr toeto toetw tofet toffo tofop tofor tofte toore topee toper topet topo- topof topor topot toppo topto torce toreo toret