a-a aaa aaf aag aap aar aas af- afa aff afg afp afr afs ag- aga agf agg agp agr ags ap- apa apf apg app apr aps ar- ara arf arg arp arr ars as- asa asf asg asp asr ass faa faf fag fap far fas ffa fff ffg ffp ffr ffs fga fgf fgg fgp fgr fgs fpa fpg fpp fpr fps fra frf frg frp frr frs fsa fsf fsg fsp fsr fss g-p gaa gaf gag gap gar gas gfa gff gfp gfr gfs gga ggg ggp ggr ggs gpa gpf gpg gpp gpr gps gra grf grg grp grr grs gsa gsf gsg gsp gsr gss p-p paa paf pag pap par pas pfa pff pfg pfp pfr pfs pga pgf pgg pgp pgr pgs ppa ppf ppg ppp ppr pps pra prf prg prp prr prs ps- psa psf psg psp psr pss ra- raa raf rag rap rar ras rfa rff rfg rfp rfr rfs rga rgf rgg rgp rgr rgs rpa rpf rpg rpp rpr rps rra rrf rrg rrp rrr rrs rsa rsf rsg rsp rsr rss saa saf sag sap sar sas sfa sff sfg sfp sfr sfs sga sgf sgg sgp sgr sgs spa spf spg spp spr sps sr- sra srf srg srp srr srs ss- ssa ssf ssg ssp ssr sss