bbbbbb bhutto bo-hoo booboo boohoo borbor bororo bothr- botoro boubou bourou bourth boutob brotto brubru brutto btooth bububu burbot burbur burhou burotu burutu butbro buttto buutuo h-hour hohhot hohoho hoohoo hooroo hororo horror hortor hotbot hotoro hottot hottub houtou htruth hubbub hububb huh-uh huhhot hurroo hurth huthur huthut obturb ohohoh ohtoto oohooh oooooo orrho- orrour ortho- ottoor outour outtro rhobtb roboto rotour rotout rotrou routot rubbot rubout rubro- rubutu ruhroh rurutu rutour thoro- thourt thouth throut thurbo toboot tohoro toohot tootoo tororo toroth tortor tortou totoro totrot touhou tourou toutou toutuo trotro tuotuo turbo- turbot turtur tururu tutour tuttut u-boot uh-huh urhobo utouth utroor