bbbee be-er be-ro beber bebop beebe beepi beeri beibi beier beipu beire beoir beour bepop beppe beppo beppu berbe berei berie berio beriu berob beroe beror berre berri berru beuer beure bibbe bibbo biber bibie bibio bibri biebe biere bieri bieup biore bioue bipib birie birou birur biure bo-bo bobbi bobr bobre bobri bobup boero boeur boibe boier boire boiro booer boore booru borbo boree borer borio boro- boroo borou borre borro borup bouee bouer boure bouri brebu breer breo- brere breu- bribe brier briou brobo broer broue brrrr bruer bruiu bruri bubbe buber buipe buire burie burio buroo burri burro burru e-pro ebber ebbie ebibe eboue ebrio ebure eeeee eepee eerie eieio eipri eirie eorre eppie epure erbbe erber erere erier erio- eroor erore error eubie eubro euro- europ eurre i-beo ibbur ibero ibibo ibore ieiri iepe ieper ierei ieroe iiiee iiiii ioooi ioooo iorio iperu ipour ippee ippei ipubi irepo irobo irori irour irrep irupi iurie o-r-b obeie oboro oboue obreb oeiro oeppo oo-er ooioo ooooo oorie opepe opere opier opio- opir opobo opper oppie orebi oreo- oreoi orere orero oribe oribi orobe orobo oroer oropi orube oruro ouir- ouoro oure- ourie p-rep pebi- pebie pebre peebo peebu peere peeri peire pepee pepoi peppe peppi pepup perer peri- perie perio perou perre perri perro perur peure pibor piere pieri piero pieup piibe piiri piper pippi pippo pipri pirie pirou pirre pirri pirro pirui piuri piuro piuru po-po pobe poeir poipu poire pooer poope poopo poore poori poper popoi popop poppe poppi poppo popup poreb porer poro- poroi porri porro porur pouer poupe poure preie preop prier priob prior probe probo proer proor prop- prope propp propr prore puber pubo- pueri puero puppe puppo pupri puree purer purie purio puro- purre puuri re-up rebbe reber rebop reepe reere repop repor reppe repro repub rere- reree rerip rerir rerob reuer reuir ribbi riber ribie ribo- ribup riper ripio rippe ripup ririe rirpu riuer ro-ro robbe robbi robbo rober robie robo- robop robor robur roero rooer roope roore rooue roper roppe rorbu rorer rouer roure rprop rripe rubbi rubee ruber rubie rubio rubor rubup ruere ruiru rupee ruper rupie u-pop uber- ubirr ubobo uiro uouee upier upper uppie ureo- uribe uroob uropi urour urubu urupe ururi uuuuu