-tree bbbee be-er be-ro beber bebot beebe beete beote berbe beret berob beroe beror berow berre berte berto berwe betee beter betoo betor betow betre bett- bette betto bewer bewet bewte bo-bo bobet bobr bobre boero booer boore boort boowe borbo boree borer boret boro- boroo borot borow borre borro borwe botet botew botro botte bower bowet bowow bowre bowte bowto breer breet breo- brere breto brett brewe brobo broer broto browe brrrr btr-t ebber ebbet ebert eeeee eorre erbbe erber erere erewe eroor erore eroto errew error erte erter etete etoro etree etter etwee ewert o-r-b obbet obert obete oboow oboro obote obowo obreb obrow oo-er ooooo oowee orbot oreo- orere orero orobe orobo oroer orret orrow orter ortet ortoo ortwo orwoe otere otero ototo otter oweto owre- owte- owtte rebbe reber rebet reere reewe reowe rere- reree reret rerob rerow retee reter retew retow retro rette retto rewer rewet ro-ro robbe robbo rober robo- robor robot robrt robte roero roewe rooer roore roote rorer roteb roter roto- rotor rotot rotte rotto rower rowet rowte rowto rowwe tbtbt teber tebet tebow teret teror terre terro tert- teter tetr- tetro tette tewer tewet tewor to-be tobbe tober tobet tobor tobot tobre toerr toeto toetw toobe toore torbe toreo toret torob torow torre torro torte torto toter toto- totoe totoo totte totwo toweb towee tower towoo towre treer treet trere trete trett trewe troee trott trowe ttttt tweer tweet twere twoer twoor twort twote twoto webbe weber webwe weere weero weert weete weore weote weowe werbe were- werew werre werte weter wetoo wette wetto woebe woeto wooer woore woote woree worow worre wotte wowee wowow wowte wrete wrett wroot wrote wrowe wwwww