dddd ddpo dnpo dod- dodd dodo dond donn dono donp donr dood doon doop door dopo dopp dopr dord dorn doro dorp dorr drno drod dron drop nddo ndnp ndop ndor ndpd ndpr nnnn nnpr nodo non- nonn nono noo- noon nooo noop noor nor- nord norn noro norr nppd nron nrpn nrrd oddd odon odoo odop odor odrp ondo onno onod onon onor oooo oord opo- opon opor oppo ordn ordo orno oro- oron oror orro pdpn pdpr pnon pnpo pnpp pnro pod- podd podo pond pono ponp pood poon poop poor pop- popo popp porn poro porr ppod pppd pppn pppo pppp prnd prnp pro- prod pron proo prop prpd prrd rndp rnod rodd rodo rond rono rood roon roop roor ropo roro rpdp rpon rppn rrrr