ddd ddn ddo ddp ddz dnd dnn dno dnp dnz dod don doo dop doz dpd dpn dpo dpp dpz dzd dzo dzp ndd ndn ndo ndp nnn nno nnp nnz no- nod non noo nop noz npd npn npo npp npz nzd nzo nzp nzz odd odn odo odp on- ond onn ono onp oo- ood oon ooo oop op- opd opn opo opp ozo ozz p-p pdd pdn pdo pdp pdz pn- pnd pnn pno pnp pod pon poo pop poz ppd ppn ppo ppp ppz pzp znd znn zno znp zo- zod zon zoo zpo zpp zzz