g-p ggg ggi ggp ggr ggs gig gii gip gir gis gpg gpi gpp gpr gps grg gri grp grr grs gsg gsi gsp gsr gss igg igi igp igr igs iii iip iir iis ipg ipi ipp ipr ips ir- irg iri irp irr irs is- isg isi isp isr iss p-p pgg pgi pgp pgr pgs pig pii pip pir pis ppg ppi ppp ppr pps prg pri prp prr prs ps- psg psi psp psr pss rgg rgi rgp rgr rgs rig rii rip rir ris rpg rpi rpp rpr rps rrg rri rrp rrr rrs rsg rsi rsp rsr rss sgg sgi sgp sgr sgs sig sii sip sir sis spg spi spp spr sps sr- srg sri srp srr srs ss- ssg ssi ssp ssr sss