-up nnn nno nnp nnu no- non noo nop nor nou npn npo npp npr npu nrn nro nrp nrr nru nun nuo nup nur nuu on- onn ono onp onr onu oo- oon ooo oop oor op- opn opo opp opr or- orn oro orp orr oru ou- oun ouo oup our p-p pn- pnn pno pnp pnr pnu pon poo pop por pou ppn ppo ppp ppr ppu prn pro prp prr pru pun pup pur puu rnn rno rnp rnr rnu ron roo rop ror rou rpn rpo rpp rpr rpu rrn rrp rrr rru run ruo rup rur ruu un- unn uno unp unr unu uon uoo uop uor up- upn upo upp upr upu ur- urn uro urp urr uru uun uur uuu