bbbee be-er be-ro beber bebop beebe beffe befoe befor befur beofe beoff beour bepop beppe beppo beppu berbe berob beroe beror berre berru beuer beure bo-bo bobr bobre bobup boero boeuf boeur boffo booer boore booru borbo boree borer boro- boroo borou borre borro borup bouee bouer boure brebu breef breer breo- brere breu- brobo broer broue brrrr bruer bruff bubbe buber buffe buffo buroo burro burru e-pro ebber eboue ebure eeeee eepee efere effer efore efuru eofor eorre epure erbbe erber erere eroor erore error eubro euro- europ eurre febre feeor feere fefor feoff ferr- ferre ferro feuer foore fore- foreo forro forur fouee foupe fourb foure fouro freep freer frere freur frobe froop frore froup fu-fu fuero furbo furo- furor o-fer o-r-b oboro oboue obreb oeppo offer offof offre ofour ofpop oo-er ooooo opepe opere opobo opper oreo- orere orero orfeo orfeu orfoe orfor orobe orobo oroer orube oruro ouoro oure- p-rep pebre peebo peebu peere pepee peppe pepup perer perou perre perro perur peure pforp po-po pobe pooer poope poopo poore poper popop poppe poppo popup poreb porer poro- porro porur pouer pouff poupe poure preef preff preop probe probo proer profe proff proof proor prop- prope propp propr prore puber pubo- puero puppe puppo puree purer puro- purre re-up rebbe reber rebop reefe reepe reere refer reffe reffo repop repor reppe repro repub rere- reree rerob reuer ro-ro robbe robbo rober robo- robop robor robur roero roffe rofor rooer roofe roope roore rooue roper roppe rorbu rorer rouer roufe roure rperf rprop rubee ruber rubof rubor rubup ruere ruffe ruffo rufo- rupee ruper u-pop uber- ubobo ufere ufofu uforb uouee upfor upoff upper ureo- uroob urour urubu urupe uuuuu