bbbb bblb bhor blno blob blon bloo bnor bnrr bobb bobo bohl bohn boho bohr boll boln bolo bonn bono boob booh bool boon boor bor- borh born boro borr brno brob broh brol bron broo bror brrr hhhh hobo hohl hohn hoho hol- holb holh holl holn holo hono hool hoon hoor horl horn horo horr hrbl hrob hron lblr lhhh lhor llll lloo lob- lobb lobh lobo lohn loho lohr loll lolo lono lonr loob lool loon loor lorn loro lron lrrr nbbo nhhl nhnn nhon nlrb nnnn nobo nohn noho noll nolo non- nonn nono noo- noob nool noon nooo noor nor- norb norn noro norr nrlb nron nrrl obbo obol obon obor obrh obro ohho ohno ohob ohoh ohrn olbo ollo olon olor onno onon onor ooho oolo oooh oooo orbb orbo orlo orno oro- oron oror orro rbbb rbbr rboh rhob rhoh rhon rnbr rnhl rob- robb robo rohl rohn rohr roll rolo rono roob rool roon roor roro rrrr