g-p ggg ggi ggo ggp ggs gig gii gio gip gis gog goi goo gop gos gpg gpi gpo gpp gps gsg gsi gso gsp gss igg igi igo igp igs iii iio iip iis io- iog ioi ioo iop ios ipg ipi ipo ipp ips is- isg isi iso isp iss o-i ogg ogi ogo ogp ogs oii oio oip ois oo- oog ooi ooo oop oos op- opg opi opo opp ops os- osg osi oso osp oss p-p pgg pgi pgo pgp pgs pig pii pio pip pis pog poi poo pop pos ppg ppi ppo ppp pps ps- psg psi pso psp pss sgg sgi sgo sgp sgs sig sii sio sip sis sog soi soo sop sos spg spi spo spp sps ss- ssg ssi sso ssp sss