bbbee be-er be-ro beber bebop beebe beeve beour bepop beppe beppo beppu berbe berob beroe beror berre berru beuer beure beuve bever bevor bevue bo-bo bobov bobr bobre bobup boero boeur booer boore booru borbo boree borer boro- boroo borou borov borre borro borup borve borvo bouee bouer boure bovee brebu breer breo- brere breu- breve brobo broer broue brrrr bruer bubbe buber buroo burov burro burru e-pro ebber eboue ebure eeeee eepee eevee eever eorre epure erbbe erber erere ereve eroor erore error eubro euro- europ eurre evere evero everr eveve evoor evour o-r-b oboro oboue obreb obrov oeppo oo-er ooooo oovoo opepe opere opobo opovo opper oreo- orere orero orobe orobo oroer orube oruro ouoro oure- ouver ouvre over- overo p-rep pebre peebo peebu peere peeve pepee peppe pepup perer perou perov perre perro perur perve pervo peure po-po pobe pooer poope poopo poore poove poper popop popov poppe poppo popup poreb porer poro- porro porur pouer poupe poure pover povvo preop preve probe probo proer proor prop- prope propp propr prore prove provo pruve puber pubo- puero puppe puppo puree purer puro- purre re-up rebbe reber rebop reepe reere reeve repop repor repov reppe repro repub rere- reree rerob reuer revep rever revue revup ro-ro robbe robbo rober robo- robop robor robur roero rooer roope roore rooue roove roper roppe rorbu rorer rouer roure rover rprop rubee ruber rubor rubup ruere rupee ruper u-pop uber- ubobo uouee upper ureo- uroob urour urubu urupe uuuuu uvrou v-bob v-bor v-pop veber vebre veere veeve veper verbo vereb verre verve veuve veveo vever voere voobu voore vooru vorbe vorre vorup voure vprbp vrbov vuere vuver