bbbee bebel beblo beebe beele beffe befoe befol belbo belee belef bellb belle bello belue beofe beoff beule bleue bloef bloue bluff bo-bo boble boeol boeuf boffo bolbe bolel boleo boll- bolle bollo bollu boole bouee bouel boul- boule boulo bubbe buble buell buffe buffo bufle bulb- bull- bulle bulou bulul ebble ebell ebelo eblul eboue ebull eeeee elele eleo- ellel elloe ellul eloee eloff elole elubo elulu euell febel feble feele felle feoff feole feule fluff fluo- folle follo foole fouee fouel foule fu-fu fulbe fulle fullf fullo lebel leell leeof lefeu leffe lefou leful leleu lelle lobbe lobbo loble lobo- loffe lofou lollo lolol loobu loule lubbe luble luebo lulle lulul obele obole obolo oboue offof oleo- olleo ooooo oullo ubble ubobo uelfe ufofu ululu uouee uuuuu