bbbbbb bobrok bokoro booboo boortz borbor borkou boroko bororo borzuk botoko botoro boubou boukou bourou boutob brokkr brotto brubru brutto bububu bukkur bukoto bukuru burbot burbur burkut burotu buruku burutu butbro buttto buutuo kkoktu koboko kokoku kokoro kokott kokubo kookoo kootoo koottu korbut korkor korkut kororo korubo koruru kotoko kottur kotuku koubou koukou kouoro kourou kourtt koutou kozoku kubutz kuroko kurort kururu kuzuko obturb ookroo oooooo orozko orrour ottoor outour outtro ozourt ozturk roboto rokkor rokuko rokuro rotork rotour rotout rotrou routot rubbot rubout rubro- rubutu rukozo rukutu rurutu rutour tkoutt toboot tobruk tokuko tokuro tookto tootoo toozoo torkuz tororo tortor tortou totoro totrot tourou toutou toutuo trokut trotro tuktuk tuotuo turbo- turbot turko- turtuk turtur tururu tutour tuttut u-boot urrotz utkoor utroor utukku utukur zoozoo zorzor zoukou zouzou