fff ffg ffk ffo ffp ffr ffs fgf fgg fgp fgr fgs fkf fkg fkk fkp fof fog fok foo fop for fos fpg fpk fpo fpp fpr fps frf frg frk fro frp frr frs fsf fsg fsk fso fsp fsr fss g-p gff gfk gfo gfp gfr gfs ggg ggo ggp ggr ggs gko gkp gks gof gog gok goo gop gor gos gpf gpg gpk gpo gpp gpr gps grf grg grk gro grp grr grs gsf gsg gsk gso gsp gsr gss kff kfg kfo kfs kgf kgo kgp kgs kkk kkp kkr kks kof kog kok koo kop kor kos kpf kpk kpo kpp kpr kps krf krg krk kro krp krr krs ksf ksg ksk kso ksp ksr kss of- off ofg ofo ofp ofr ofs ogf ogg ogo ogp ogs okg okk oko okp okr oks oo- oof oog ook ooo oop oor oos op- opf opg opk opo opp opr ops or- orf org ork oro orp orr ors os- osf osg osk oso osp osr oss p-p pff pfg pfk pfo pfp pfr pfs pgf pgg pgk pgo pgp pgr pgs pkf pkg pko pkp pkr pks pof pog pok poo pop por pos ppf ppg ppk ppo ppp ppr pps prf prg prk pro prp prr prs ps- psf psg psk pso psp psr pss rff rfg rfk rfo rfp rfr rfs rgf rgg rgk rgo rgp rgr rgs rkf rkg rkk rko rkp rks rof rog rok roo rop ror ros rpf rpg rpk rpo rpp rpr rps rrf rrg rrk rrp rrr rrs rsf rsg rsk rso rsp rsr rss sff sfg sfk sfo sfp sfr sfs sgf sgg sgk sgo sgp sgr sgs sk- skf skg skk sko skp skr sks sof sog sok soo sop sor sos spf spg spk spo spp spr sps sr- srf srg srk sro srp srr srs ss- ssf ssg ssk sso ssp ssr sss