-hou bbbb bbpr bhor bhur bhuu bnor bnpp bnrr bobb bobo bobu bohn boho bohr bohu bonn bono bonu boob booh boon boop boor bopp bor- borh born boro borr boru bouh boun boup bour brno brob broh bron broo bror brou brrr bruh brun brup bubb bubo bubu buho buhr bunb bunn buno bunu buon bur- burb burh burn buro burp burr buru hhhh hobo hohn hoho hono honu hoon hoop hoor hopo hopp horn horo horr houp hour hrob hron hrpp hrun hubb hubo huhn huhu hunh huon huor hupp hurn huro hurr huru huub n-up nbbo nbpp nhnn nhon nhrp nnnn nnpr nobo nobu nohn noho non- nonn nono nonu noo- noob noon nooo noop noor noph nor- norb norn noro norr nouh noun noup nour nron nrpn nunn nuno nuon nurn nurp nurr nuru obbo obon obor obrh obro obuh ohho ohno ohob ohoh ohrn onno onon onor onpu onup onur ooho oooh oooo opo- opon opor oppo orbb orbo orbu orno oro- oron oror orph orro orub orup oun- ouph our- ourn ouro ouu- phno phob phoh phon phoo phrr phun pnon pnpo pnpp pnro pnup pobo pono ponp pooh poon poop poor pop- popo popp porb porn poro porr poun poup pour pppn pppo pppp ppru ppur prnp pro- prob pron proo prop prou pruu pubu puhn puno punu pupu pur- purb puro purp purr puru rbbb rbbr rboh rhob rhoh rhon rhun rnbr rob- robb robo robu rohn rohr rohu rono roob roon roop roor ropo roro roru roub rouh roun roup rpho rpob rpon rppn rrrr rrun rubb rubp rubu ruhh ruhn ruhr runn runo rupp ruro rurp ruru ruun u-rp ubbo ubon uhno uhoh uhuh uhup unno unon unop unro uor- upnp upon upor uppp uppu upup urho uro- uroo urpo urrh urun urup urur uuno uuuu