bbbb bbdd bbdo bbpr bd-r bobb bobo bodb bodo boob bood boop boor booz bopp bor- bord boro borr borz bozo bprd brdo brob brod broo bror broz brrr bzzz d-bo dbpd dddd ddpo dobb dod- dodd dodo doob dood doop door dopo dopp dopr dord doro dorp dorr dozo drob drod drop droz dzbb dzor dzrr obbo obor obro odbo oddd odoo odop odor odrp oooo oord opo- opor oppo orbb orbo ordo oro- oror oroz orro orzo ozd pdpr pobo pod- podd podo pood poop poor pop- popo popp porb poro porr porz pozo ppod pppd pppo pppp pro- prob prod proo prop proz prpd prrd rbbb rbbr rdbp rob- robb robo rodd rodo roob rood roop roor rooz ropo roro rozz rpdp rpob rrrr z-ro zobo zodd zoo- zoop zorb zord zoro zozo zzzz