bbbee be-er be-ro bebel beber beblo beebe beele beffe befoe befol befor befur belbo belee belef bellb belle bello belue belur beofe beoff beour berbe berel berle berlo berob beroe berol beror berre berru beuer beule beure bleer blere bleue bloef bloor blorb blore bloue bluer bluff blufr blurb blure blurr bo-bo boble bobr bobre boeol boero boeuf boeur boffo bolbe bolel boleo boler boll- bolle bollo bollu booer boole boore booru borbo boree borel borer borle boro- boroo borou borre borro borul bouee bouel bouer boul- boule boulo boure brebu breef breel breer brell brelo breo- brere breu- brobo broer brole broll brolo brool broue brrrr bruer bruff brule brull bubbe buber buble buell buffe buffo bufle bulb- bull- bulle bulou bulul burel burle burol buroo burro burru ebber ebble ebell ebelo eberl eblul eboue ebull ebure eeeee eeler efere effer efore efuru elele eleo- ellel eller elloe ellul eloee eloff elole eloor elore eloro elrob elubo elulu eluru eofor eorre erbbe erber erere eroor erore errol error eubro euell euler eurel euro- eurre febel feble febre feele feeor feere fefor felle feoff feole ferel ferle ferlo ferr- ferre ferro feuer feule fleer flere flero fleur floor flore floro floru flour fluff fluo- fluor flurb flure flurr folle follo foole foore fore- forel foreo forro forur fouee fouel foule fourb foure fouro freel freer frere freur frobe frore fu-fu fuero fulbe fulle fullf fullo furbo furel furo- furor lebel leber leell leeof leere lefeu leffe lefou leful leleu lelle lerer leuro lobbe lobbo lober loble lobo- lobor lofer loffe lofou loler lollo lolol loobu looer loore lorel loreo lorer lorre louer loule loure louro lubbe luber luble lubur luebo lufre lulle lulul lurer lurue o-fer o-r-b obele obole obolo oboro oboue obreb oerel oerle offer offof offre ofour oleo- olere olleo oller ollur olour oo-er ooooo orble orell oreo- orere orero orfeo orfeu orfoe orfor orful orobe orobo oroer orolu orube oruro oullo ouoro oure- ourol rebbe rebel reber rebol reefe reere refel refer reffe reffo relee rello relue rere- reree rerob reuel reuer reule ro-ro robbe robbo rober roble robo- robor robur roell roero rofel roffe rofor roleo rolfe rolfo rolle rollo rooer roofe roole roore rooue rorbu rorer rouer roufe roule roull roure rubee rubel ruber ruble rubof rubor ruele ruell ruere ruffe ruffo rufo- rufol ruler rullo ruule ubble uber- ubobo uelfe ufere ufofu uforb ullur ululu uluru uouee urelu ureo- uroob urour urubu uuuuu