g-p ggg ggi ggo ggp ggr ggs gig gii gio gip gir gis gog goi goo gop gor gos gpg gpi gpo gpp gpr gps grg gri gro grp grr grs gsg gsi gso gsp gsr gss igg igi igo igp igr igs iii iio iip iir iis io- iog ioi ioo iop ior ios ipg ipi ipo ipp ipr ips ir- irg iri iro irp irr irs is- isg isi iso isp isr iss o-i ogg ogi ogo ogp ogs oii oio oip oir ois oo- oog ooi ooo oop oor oos op- opg opi opo opp opr ops or- org ori oro orp orr ors os- osg osi oso osp osr oss p-p pgg pgi pgo pgp pgr pgs pig pii pio pip pir pis pog poi poo pop por pos ppg ppi ppo ppp ppr pps prg pri pro prp prr prs ps- psg psi pso psp psr pss rgg rgi rgo rgp rgr rgs rig rii rio rip rir ris rog roi roo rop ror ros rpg rpi rpo rpp rpr rps rrg rri rrp rrr rrs rsg rsi rso rsp rsr rss sgg sgi sgo sgp sgr sgs sig sii sio sip sir sis sog soi soo sop sor sos spg spi spo spp spr sps sr- srg sri sro srp srr srs ss- ssg ssi sso ssp ssr sss