-hou bbbb bhor bhur bhuu bnor bnrr bobb bobo bobu bohn boho bohr bohu bokn boko boku bonk bonn bono bonu boob booh book boon boor bor- borh bork born boro borr boru bouh bouk boun bour brkb brno brob broh brok bron broo bror brou brrr bruh brun bubb bubo bubu buho buhr bukh bukk buko buku bunb bunk bunn buno bunu buon bur- burb burh burk burn buro burr buru hhhh hkbu hobo hohn hoho hoko hoku honk hono honu hook hoon hoor hork horn horo horr houk hour hrob hron hrun hubb hubo huhn huhu hunh hunk huon huor hurk hurn huro hurr huru huub kbbb kbbk kbbo kbbr kbbu kbhb kbhh kbhn kbhr kbkb kbkk kbko kbkr kbnh kbnn kbno kbnr kbnu kbob kbok kbon kboo kbrb kbrh kbrk kbrn kbro kbru kbub kbuk kbun kbur kbuu khbr khhk khho khkk khkn khkr khnk khnr khnu khob khok khon khor khou khrk khro khrr khub khuk khun khur kkbb kkbn kkbo kkbr kkhb kkhh kkhk kkhr kkkk kknb kknn kkno kknu kkob kkoh kkon kkoo kkor kkrb kkrh kkrk kkrn kkro kkrr kkuu knbb knbn knbr knbu knhk knkk knnb knnk knnr knob knok knon knor knou knrb knrk knro knub knuk knur kobb kobk kobn kobo kobr kobu kohh kohn koho kohr kohu kokb kokh kokk kokn koko kokr koku konk kono koob kook koon kooo koor koou korb kork korn koro korr koru koub kour kouu krbb krbk krbr krkh krkk krkn krko krkr krku krnb krnh krnk krnn krno krnu krob kroh krok kroo kror krrb krrk krrn krro krrr kruh kruk krun krur kubb kubo kubr kubu kuhn kuhu kukh kukk kukn kuku kunk kuno kunr kunu kuok kuon kuoo kurb kurk kuro kurr kuru kuub kuuk kuur kuuu nbbo nhnn nhon nkok nkor nnnn nobo nobu nohn noho noko non- nonn nono nonu noo- noob nook noon nooo noor nor- norb nork norn noro norr nouh noun nour nron nubk nuku nunk nunn nuno nuon nurn nurr nuru nuuk obbo obkb obok obon obor obrh obro obuh ohho ohno ohob ohoh ohok ohrn okko okno okok okon okor okro okun okur onno onon onor onur ooho ooku oooh oooo orbb orbo orbu orko orno oro- orok oron oror orro orub oun- our- ourn ouro ouu- rbbb rbbr rboh rhob rhoh rhon rhun rnbr rob- robb robo robu rohn rohr rohu rokh rokk roko rokr roku ronk rono roob rook roon roor rork roro roru roub rouh rouk roun rrrr rrun rubb rubu ruhh ruhn ruhr rukh rukk rukn ruku runk runn runo ruok ruro ruru ruun ubbo ubon uhno uhoh uhok uhuh ukko ukok ukon ukur unkn unko unno unon unro uor- urho uro- urok uroo urrh uruk urun urur uuno uuuu