bbbb bblb bboy bbpr bbyo blob bloo blop bloy bly- bobb bobo boby boll bolo boly boob bool boop boor bopp bor- boro borr bory boyl boyo brlp brob brol broo bror brrr bry- bryo byob byol byop lblr llll lloo llyr lob- lobb lobo loby loll lolo loly loob lool loop loor lopp loro lory lppl lprp lrrr lrry lyly lyo- lyro obbo obby obol obor oboy obro olbo olby ollo olly olor olry ooby oolo oooo oory opo- opor oppo oppy opry orbb orbo orby orlo orly oro- oror oroy orro orry oyly plbr plob ploo plop ploy plpp pobo poll polo poly pool poop poor pop- popo popp popy porb poro porr pory poyo poyr pplo pppo pppp prlr pro- prob prol proo prop pyl- pyll pyo- pypy pyr- pyrl pyro pyry rbbb rbbr rob- robb robo roby roll rolo rolp roly roob rool roop roor ropo ropy roro rory royl rpob rrrr rybp ryob ybor ybry yobo yoll yolo yolp yoly yool yoop yopo yopy yoro yory yoyo yrly yyyy