BUTTONHOLD

bo do ho lo no nu od oh on to uh un ut

bod boo bot bud bun but dol don dot dub duh dun duo hob hod hon hot hub hun hut lob loo lot nob nod noh noo not nth nub nut oho old ono ooh oot oud out tho tod ton too tot tub tun tut udo

bhut blot boho bold bolo bolt bond boon boot both bott bout buhl bund bunt butt dolt doth dunt hobo hold holt hood hoot hunt lobo loon loot loth loud lout lunt nolo obol onto otto thou thud told tolu tool toon toot tout udon undo unto