bbbee be-er be-ro beber bebop beebe bepop beppe beppo berbe berob beroe beror berre bo-bo bobr bobre boero booer boore borbo boree borer boro- boroo borre borro breer breo- brere brobo broer brrrr e-pro ebber eeeee eepee eorre erbbe erber erere eroor erore error o-r-b oboro obreb oeppo oo-er ooooo opepe opere opobo opper oreo- orere orero orobe orobo oroer p-rep pebre peebo peere pepee peppe perer perre perro po-po pobe pooer poope poopo poore poper popop poppe poppo poreb porer poro- porro preop probe probo proer proor prop- prope propp propr prore rebbe reber rebop reepe reere repop repor reppe repro rere- reree rerob ro-ro robbe robbo rober robo- robop robor roero rooer roope roore roper roppe rorer rprop