biffi bilbi bili- bilif billi billu bilut bitit bitti blitt bluff blufi bluft buffi built bulb- bulbi buliu bull- bulli bulti bulul bulut butit butut fili- filtu fitil fitit fluff fluit ft-lb fu-fu fullf ibill if-- ifill ifttt iiiii iitti iliff ilift illit illui ilulu itbit itfit ittti itu-t itutu iuliu li-fi lilfu liliu lilli littb litti litui liuli luiff lulli lulul lutfi lutui tbill tbtbt tbutt ti-ti tibbi tibbu tilfi tilli titii titil titli titti ttttt tubi- tubli tubul tuffi tufit tuili tului tutli tutti tuubi tuuli u-bit uifli uitti ululu uluti utili uuuuu