-tree c-cor c-p-c c-pop c-tec ccccc ccett ceco- ceere 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 cooee cooer coope coopt coore coote copce copec coper coppe coppo copr- copre copro copte copto corce core- coree corer coro- corop corot corpe corre corte corto coter cott- cotte cotto cowee cower cowpe cowre cpctc crece creep creer creo- creop creot crepe crept crete crewe croce croco crooe croop croot cropc crope cropo crore crote crott crowe crowp crwet cteep ctree cttee e-pro ecorp ecto- ector ectot eeeee eepee eorre epcot eperc epopt epote erect erept erere erewe eroor erore eroto errew error erte erter etete etoro etree etter etwee ewert ocoee ocote ocree octet octo- octor oeco- oeppo oo-er oocre ooooo oowee opepe opere opper opter opto- optot optto orcet orcop oreco oreo- orere orero 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 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 potoo potop potor potpe potro potte potto pow-r powce powee power powow powpe powre powte prece preco preop prete preto prewe proer proor proot prop- prope propp propr propt prore prot- proto prtor pter- ptere ptero ptprc ptpre ptpro ptprr ptprt pttow pweto r-co- recce recco recep recet recpt rect- recte recto reece reepe reere reewe 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 rooer roope roore roote roper roppe rorer roter roto- rotor rotot rotte rotto rowce rower rowet rowte rowto rowwe rprop rptor t-pop t-top teepe teoco tepco tepee tepet tepor teppo terce terco teret teror terre terro tert- teter tetr- tetro tette tewer tewet tewor tocco toco- toece toerr toeto toetw toore topee toper topet topo- topor topot toppo topto torce toreo toret torow torpe torpo torre torro torte torto toter toto- totoe totoo totop totte totwo towee tower towoo towre tpc-w tprot treco treer treet trepp trept trere trete trett trewe troco troee troop trop- trope tropo trott trowe trwce ttttt tweep tweer tweet twere twerp twoer twoor twort twote twoto wcoop weepe weere weero weert weete weope weorc weore weote weowe weper wepte werce were- werew werpe werre werte weter wetoo wette wetto woeto wooer woore woote woree worow worpe worre wotte wowee wowow wowte wrete wrett wroot wrote wrowe wwwww