g-p ggg ggn ggp ggr ggs gnn gnp gnr gns gpg gpn gpp gpr gps grg grn grp grr grs gsg gsn gsp gsr gss ngg ngn ngp ngs nng nnn nnp nns npg npn npp npr nps nrg nrn nrp nrr nrs nsg nsn nsp nsr nss p-p pgg pgn pgp pgr pgs pn- png pnn pnp pnr pns ppg ppn ppp ppr pps prg prn prp prr prs ps- psg psn psp psr pss rgg rgn rgp rgr rgs rng rnn rnp rnr rns rpg rpn rpp rpr rps rrg rrn rrp rrr rrs rsg rsn rsp rsr rss sgg sgn sgp sgr sgs sng snn snp snr sns spg spn spp spr sps sr- srg srn srp srr srs ss- ssg ssn ssp ssr sss