fff ffg ffi ffo ffp ffs fgf fgg fgi fgp fgs fif fig fii fip fis fof fog foi foo fop fos fpg fpi fpo fpp fps fsf fsg fsi fso fsp fss g-p gff gfi gfo gfp gfs ggg ggi ggo ggp ggs gif gig gii gio gip gis gof gog goi goo gop gos gpf gpg gpi gpo gpp gps gsf gsg gsi gso gsp gss i-f iff ifg ifi ifo ifp ifs igf igg igi igo igp igs iif iii iio iip iis io- iof iog ioi ioo iop ios ipf ipg ipi ipo ipp ips is- isf isg isi iso isp iss o-i of- off ofg ofi ofo ofp ofs ogf ogg ogi ogo ogp ogs oif oii oio oip ois oo- oof oog ooi ooo oop oos op- opf opg opi opo opp ops os- osf osg osi oso osp oss p-p pff pfg pfi pfo pfp pfs pgf pgg pgi pgo pgp pgs pif pig pii pio pip pis pof pog poi poo pop pos ppf ppg ppi ppo ppp pps ps- psf psg psi pso psp pss sff sfg sfi sfo sfp sfs sgf sgg sgi sgo sgp sgs sif sig sii sio sip sis sof sog soi soo sop sos spf spg spi spo spp sps ss- ssf ssg ssi sso ssp sss