nnn nno nnp no- non noo nop nor noy npn npo npp npr nrn nro nrp nrr nry nyn nyo nyp nyy on- onn ono onp onr ony oo- oon ooo oop oor op- opn opo opp opr opy or- orn oro orp orr ory oyo p-p pn- pnn pno pnp pnr pny pon poo pop por poy ppn ppo ppp ppr prn pro prp prr pry py- pyn pyo pyr rnn rno rnp rnr rny ron roo rop ror roy rpn rpo rpp rpr rrn rrp rrr ry- ryn ryo ryr ryy ynn ynp yny yon yoo yop yor yoy ypo yrn yro yrp yyy