bbbb bboy bbpr bbyo bhor bhoy bobb bobo boby boho bohr bohy boob booh boop boor bopp bor- borh boro borr bory boyo brob broh broo bror brrr bry- bryo byob byop hhhh hobo hoby hoho hoop hoor hopo hopp hopy horo horr hory hrob hrpp hryb hybo hyo- hyp- hyph hypo hypy obbo obby obor oboy obrh obro ohho ohob ohoh ohyo ooby ooho oooh oooo oory opo- opor oppo oppy opry orbb orbo orby oro- oror oroy orph orro orry phob phoh phoo phrr pobo pooh poop poor pop- popo popp popy porb poro porr pory poyo poyr pppo pppp pro- prob proo prop pyo- pypy pyr- pyro pyry rbbb rbbr rboh rhob rhoh rob- robb robo roby rohr rohy roob roop roor ropo ropy roro rory rpho rpob rrrr rybp ryhb ryob ryoh ybor ybry yobo yoho yoop yopo yopy yoro yory yoyo yrho yyyy