-tree bbbee be-er be-ro beber bebog bebot beebe beete begee beget begge begob begor begot begto beote berbe bereg beret berge berob beroe beror berre berte berto betee beter betoo betor betre bett- bette betto bo-bo bobet bobr bobre boege boero boger boget bogge bogoe bogor bogot booer boore boort borbo boree borer boret borge borgo boro- boroo borot borre borro botet botro botte breer breet breg- brege bregg breo- brere breto brett brobo broer broto brrrr btr-t ebber ebbet eberg ebert eeeee egger egret eorre erbbe erber erege erere ergo- ergot eroge eroor erore eroto error erte erter etete etoro etree etrog etter gberg geber gebet gebre geebo geere geert geete gegge georg gerbe gerbo gerre gertt getee geter getgo gette getto go-go go-oo go-to gobbe gobbo gobeo gobet gobot goget gogro goobo googe goore goote gorbe goree gorer gorge gorgo gorre goter gotoo gotor gotto grebe grebo greer greet grege gregg grego greot grete grett groet groge grogg groot grote grott grrrr gtrot o-r-b obbet oberg obert obete oboro obote obreb ogogo oo-er ooooo orbot oreo- orere orero orobe orobo oroer orret orrgo orter ortet ortoo otego otere otero ototo otter rebbe rebeg reber rebet reege reere reger reget regge reggo regtt reorg rere- reree reret rerob retee reter retgo retrg retro rette retto ro-ro robbe robbo rober robo- robor robot robrt robte roero roger roget rogge rooer rooge roore roote rorer roteb roter rotge roto- rotor rotot rotte rotto tbtbt teber tebet teege tegre teret terge tergo teror terre terro tert- teter tetr- tetro tette to-be to-go tobbe tobeg tober tobet tobog tobor tobot tobre toego toerr toeto toget togge toobe toore torbe toreo toret torgo torob torog torre torro torte torto toter toto- totoe totoo totte treer treet treg- trego trere trete trett troee trott ttttt