-tree bbbee bbctv be-er be-ro beber bebot becco becov beebe beete beeve beote berbe berec beret berob beroe beror berre berte berto betee beter betoo betor betre bett- bette betto bevce bever bevor bo-bo bobet boboc bobov bobr bobre bocce bocet bocor boece boero booce booco booer boore boort borbo borce borec boree borer boret boro- boroo borot borov borre borro borve borvo botet botev botro botte bovec bovee brece breer breet breo- breoc brere breto brett breve brobo broce broer broto brrrr btc-e btr-t c-cor c-evo c-tec ccccc ccctv ccett cebec ceber ceco- ceere ceoce ceoor cerc- cerce cerco cerec cerer ceret cero- ceroc cerre cerro certe cervo ceto- cette co-bo co-co cobbe cobot cobre cocc- cocce cocco coceo cocto coete coeve cooee cooer coore coote corbe corbo corce core- coree corer coro- corot corre corte corto cortv corve corvo coter cott- cotte cotto coveo cover covet crebe crece creer creo- creot crete creve croce croco crooe croot crore crote crott crove ctree cttee cvrce ebber ebbet ebert ecorv ecto- ector ectot eeeee eevee eever eorre erbbe erber erect erere ereve eroor erore eroto error erte erter etete etoro etree etter evere evero everr evert evete evett eveve evocb evoor evote o-r-b obbet obcov obert obete oboro obote obreb obrov ocoee ocote ocr-b ocree octet octo- octor oeco- oo-er oocre ooooo oovoo orbec orbot orcet oreco oreo- orere orero orobe orobo oroco oroer orret orter ortet ortoo orvet otcbb otere otero otoce ototo otrov otter ottov oveco over- overo overt ovett r-co- rebbe rebec reber rebet recce recco recet rect- recte recto reece reere reeve rere- reree reret rerob retee reter retro rette retto revco rever revet ro-ro robbe robbo robec rober robo- robor robot robrt robte rocco rocor rocov roero rooer roore roote roove rorer roteb roter roto- rotor rotot rotte rotto rover rtrev rttov tbtbt tcobb teber tebet tectb teoco terce terco teret teror terre terro tert- terve tervo teter tetov tetr- tetro tette tevet tevot to-be tobbe tober tobet tobor tobot tobre tocco toco- toece toerr toeto toobe toore torbe torce toreo toret torob torre torro torte torto torve toter toto- totoe totoo totte tover tovet trboc treco treer treet trere trete trett treve troco troee trott trove trovo ttttt tvvcr v-bob v-bor veber vebre vecer vecov veeco veere veeve verbo verco vereb verot verre verte verve vetco vette vetto vevce veveo vever voere voore vorbe vorce vorre vorte voter votre votto vrbov