bbbb bboy bbyo bnor bnrr bobb bobo boby bonn bono bony boob boon boor bor- born boro borr bory boyn boyo brno brob bron broo bror brrr bry- bryn bryo byno byob byon byrn nbbo nboy nnnn nobo non- nonn nono noo- noob noon nooo noor nor- norb norn noro norr nory noyo nron nyny nyon nyrb nyro obbo obby obon obor oboy obro onby onno onon onor onoy ooby oooo oory orbb orbo orby orno orny oro- oron oror oroy orro orry oyon rbbb rbbr rnbr rob- robb robo roby rono rony roob roon roor roro rory royn rrrr rynn ryob ryon ybor ybry ynon yobo yono yoon yorn yoro yory yoyn yoyo yron yryn yyyy