bilbi bili- billi billu bilut bipib bipil bitit bitti bitup blitt built bulb- bulbi buliu bull- bulli bulti bulul bulut butit butut ibill iiiii iitti illit illui ilulu ipiti ipubi itbit ittti itu-t itutu iuliu iuput liliu lilli lippi littb litti litui litup liuli lulli lulul luppi lupul lutui piilu pili- pillb pilut pipil pipit pipli pippi pipul pitip pitti plitt pluit plupp plut- pluti ptil- pull- pulli pullu pulut pupil putit putt- putti puttu putup tbill tbtbt tbutt ti-ti tibbi tibbu tilip tilli tipil tipit tippi tippu tipup titii titil titli titti titup ttttt tubi- tubli tubul tuili tulip tului tuppi tutli tutti tuubi tuuli u-bit uitti ululu ulupi uluti uplit uppli upput utili uuuuu