bibin bibri binit binub birin birni birun birur bitit bitru bitti bitun brini brinn brint britt brrrr bruin bruit bruiu bruni brunn brunt bruri bruun btr-t buirn bunin bunun bunut burin burn- burnt burri burru burtt burun burut butin butit butut ibbur ibtin iiiii iitti iiuni inbin inini innit inniu innti inrun inuit inurn irbit irinn irrit itbit ittti itu-r itu-t ituni ituri iturn ituru itutu iunit nibbi niibi ninib ninti nintu ninur ninut nirit nitin nitr- nitti ntini ntnui nu-nu nuiit nunit nunni nunun nurin nurit nurri nurun nutri ribbi ribin rintt rubbi rubin ruiru runin runit rutin ruutu t-nut tbtbt tbutt ti-ti tibbi tibbu tibin tibni tibur tinui tinun tirit tirru tirur titii titin titti tntnt tribu triin trini trit- tritn tritt trubu truit ttttt tubi- tubin tubri turbi turbt turin turit turn- turnt turnu turri turtu turut tutin tutti tutun tuubi tuuri tuuru u-bit u-n-i u-nii ubirr uitti unbit unini uninn uniti unnun unnur unnut unrun unurn urin- urubu uruit ururi uruti urutu uttur uturn uturu uuuuu