-hou bbbb bbng bbrg bgon bgun bhog bhor bhur bhuu bnor bnrr bobb bobo bobu bogg bogh bogo bohn boho bohr bohu bong bonn bono bonu boob boog booh boon boor bor- borg borh born boro borr boru bouh boun bour brno brob brog broh bron broo bror brou brrr brug bruh brun bubb bubo bubu bugg bugh bugo buho buhr bunb bung bunn buno bunu buon bur- burb burg burh burn buro burr buru gbbo gbon gggg gghg ggrn ghon ghug gnoo gnrr gobo gogh gogo gohb gon- gong gonn gono gonu goog goon goor gorb gorg gorn goro gorr gou- goug goun gour grbr grob grog groh gron groo gror grou grrr grub grug grun grur gubb gubu gugb gugg gugh gugu guhr gung gunn gurb gurg gurh gurn guro gurr guru hhgg hhhh hobo hogg hogh hogo hogu hohn hoho hong hono honu hoon hoor horg horn horo horr hour hrng hrob hron hrun hubb hubo hugg hugh hugo huhn huhu hung hunh huon huor hurn huro hurr huru huub nbbo ngon ngor ngou ngur nguu nhnn nhon nngn nnnn nobo nobu nogg nogh nogo nohn noho non- nong nonn nono nonu noo- noob noon nooo noor nor- norb norg norn noro norr nouh noun nour nron nung nunn nuno nuon nurn nurr nuru obbo obon obor obrh obro obuh ogb ogog ogon ogou ogro ogun ohgr ohho ohno ohob ohoh ohrn ongo ongu onno onon onor onur ooho oooh oooo orbb orbo orbu orgn orgo orno oro- oron oror orro orub ough oun- oung our- ourn ouro ouu- rbbb rbbr rbgh rboh rhbg rhob rhog rhoh rhon rhug rhun rnbr rob- robb robo robu rogg rogh rogo rohn rohr rohu rong rono roob roog roon roor roro roru roub rouh roun rrrr rrun rubb rubu rugg rugh ruhh ruhn ruhr rung runn runo ruro ruru ruun ubbo ubon uggo ugro ugur uguu uhno uhoh uhuh ungo ungu unno unon unro uor- urgh urgu urho uro- uroo urrh urun urur uuno uuuu