bibin bibri bilbi bili- bilin billi billu binub birin birni birun birur blini blinn blurb blurr brill brini brinn brrrr bruin bruiu brull bruni brunn bruri bruun buirn bulb- bulbi bulin buliu bull- bulli bulul bulun bunin bunun burin burli burn- burri burru burun ibbur ibill iblin iiiii iiuni illin illui ilulu inbin inili inini inniu inrun inurn irill irinn iuliu libin libri libru libun lilin liliu lilli lilun linin linlu liril lirui liuli lubin lubun lubur lulin lulli lulul luni- lunin lurin lurun luuri nibbi niibi nilin ninib ninur nu-nu nulli nunni nunun nurin nurlu nurri nurun ribbi ribin rubbi rubin ruili ruiru rulli runin u-n-i u-nii ubirr ullin ullur ululu uluru unini uninn unnun unnur unrun unurn urin- urubu uruli ururi uuuuu