bbbb bblb bboy bbyo blob bloo bloy bly- bobb bobo boby boll bolo boly boob bool boor bor- boro borr bory boyl boyo brob brol broo bror brrr bry- bryo byob byol lblr llll lloo llyr lob- lobb lobo loby loll lolo loly loob lool loor loro lory lrrr lrry lyly lyo- lyro obbo obby obol obor oboy obro olbo olby ollo olly olor olry ooby oolo oooo oory orbb orbo orby orlo orly oro- oror oroy orro orry oyly rbbb rbbr rob- robb robo roby roll rolo roly roob rool roor roro rory royl rrrr ryob ybor ybry yobo yoll yolo yoly yool yoro yory yoyo yrly yyyy