-tree c-cor c-p-c c-pop c-tec ccccc ccett ceco- ceere cegep cegge ceoce ceoor cepet cepot ceppo cerc- cerce cerco cerec cerer ceret cerge cero- ceroc cerre cerro certe ceto- cette co-co co-op cocc- cocce cocco coceo cocto coepe coete cooee cooer coope coopt coore coorg coote copce copec coper coppe coppo copr- copre copro copte copto corce core- coree corer corge coro- corop corot corpe corre corte corto coter cott- cotte cotto cpctc crece creep creer cregg creo- creop creot crepe crept crete croce croco crooe croop croot cropc crope cropo crore crote crott cteep ctree cttee e-pro ecorp ecto- ector ectot eeeee eepee egger egret eorre epcot eperc epopt epote erceg erect erege erept erere ergo- ergot eroge eroor erore eroto error erte erter etete etoro etree etrog etter gecco geere geert geete gegge geoop georg geppo gerce gerre gertt getco getee geter getgo gette getto go-go go-oo go-op go-to gocco gocoo goget gogro googe goore goote goper goppe gopro gorce goree gorer gorge gorgo gorre goter gotoo gotop gotor gotto grece greco greer greet grege gregg grego greot grepe grepo grete grett groce groet groge grogg groop groot grope gropp grote grott grrrr gtrot ocoee ocote ocree octet octo- octor oeco- oeppo ogogo oo-er oocre ooooo opepe opere opper opter opto- optot optto orcet orcop oreco oreo- orere orero oroco oroer orret orrgo orter ortet ortoo otego otere otero otoce ototo otpor otter p-rep pcept pcert pctct pecco peece peege peere peert peete pepco pepee peppe pept- pepto perce perec perer peret perge pergo perot perre perro perte perto petco peter petr- petre petro pette petto pgrep po-po pocop poete pogge pooer poope poopo poore poort poote popco poper popet popop poppe poppo porco porec porer poret porge porgo poro- porog porro porte porto potco potec potee poter potoc potoo potop potor potpe potro potte potto prece preco prego preop prepg prete preto proer progg proor proot prop- prope propp propr propt prore prot- proto prtor pter- ptere ptero ptprc ptpre ptprg ptpro ptprr ptprt r-co- recce recco recep recet recog recpt rect- recte recto reece reege reepe reere regec reger reget regge reggo regtt reorg repco repec repeg repet repop repor repot reppe repro reprt rere- reree reret retee reter retgo retop retrg retro rette retto ro-ro rocco rocor roero roger roget rogge rooer rooge roope roore roote roper roppe rorer roter rotge roto- rotor rotot rotte rotto rprop rptor t-pop t-top teege teepe tegre teoco tepco tepee tepet tepor teppo terce terco teret terge tergo teror terre terro tert- teter tetr- tetro tette to-go tocco toco- toece toego toerr toeto toget togge toore topee toper topet topo- topog topor topot toppo topto torce toreo toret torgo torog torpe torpo torre torro torte torto toter toto- totoe totoo totop totte tprot treco treer treet treg- trego trepp trept trere trete trett troco troee troop trop- trope tropo trott ttttt