g-p ggg ggn ggo ggp ggr ggz gnn gno gnp gnr gog gon goo gop gor goz gpg gpn gpo gpp gpr gpz grg grn gro grp grr gzo gzp gzr ngg ngn ngo ngp nng nnn nno nnp nnz no- nog non noo nop nor noz npg npn npo npp npr npz nrg nrn nro nrp nrr nrz nzg nzo nzp nzz ogg ogn ogo ogp on- ong onn ono onp onr oo- oog oon ooo oop oor op- opg opn opo opp opr or- org orn oro orp orr orz ozo ozz p-p pgg pgn pgo pgp pgr pn- png pnn pno pnp pnr pog pon poo pop por poz ppg ppn ppo ppp ppr ppz prg prn pro prp prr prz pzp rgg rgn rgo rgp rgr rng rnn rno rnp rnr rnz rog ron roo rop ror roz rpg rpn rpo rpp rpr rpz rrg rrn rrp rrr rzo z-g zgg znn zno znp zo- zog zon zoo zor zpg zpo zpp zpr zro zrp zzr zzz