bbbee bebel beebe beele beene beffe belee belef belen bellb belle belue bene- benfe benne bennu benue benun beule bleen bleue bluff bubbe buben buble buell buffe bufle bulb- bulen bull- bulle bulul bulun bunne bunun ebble ebell ebene eblul ebull eeeee elben elele elene elfen ellel ellen ellul elulu enbun enfeu enlen enuff euell eulen febel feble feele feeln felle feneu fenne feule fleen flene flenu fluff fu-fu fulbe fulen fulle fullf funel funen lebel leben leell lefeu leffe leful leleu lelle lenne lubbe luble lubne lubun lueen luen lulle lulul lunel lunne nebel neble neblu neele neelu nefen neffe nelle nellu neuen neueu neune nnebe nu-nu nubel nuble nuell nulle nunun ubble ubeen uelen uelfe ulene ululu unfun unnun uuuuu