g-p ggg ggn ggo ggp ggs gnn gno gnp gns gog gon goo gop gos gpg gpn gpo gpp gps gsg gsn gso gsp gss ngg ngn ngo ngp ngs nng nnn nno nnp nns no- nog non noo nop nos npg npn npo npp nps nsg nsn nso nsp nss ogg ogn ogo ogp ogs on- ong onn ono onp ons oo- oog oon ooo oop oos op- opg opn opo opp ops os- osg osn oso osp oss p-p pgg pgn pgo pgp pgs pn- png pnn pno pnp pns pog pon poo pop pos ppg ppn ppo ppp pps ps- psg psn pso psp pss sgg sgn sgo sgp sgs sng snn sno snp sns sog son soo sop sos spg spn spo spp sps ss- ssg ssn sso ssp sss