a-a aaa aaf aag aan aao aap aar aas af- afa aff afg afn afo afp afr afs ag- aga agf agg agn ago agp agr ags an- ana anf ang ann ano anp anr ans aoa aof aog aon aoo aop aor aos ap- apa apf apg apn apo app apr aps ar- ara arf arg arn aro arp arr ars as- asa asf asg asn aso asp asr ass faa faf fag fan fao fap far fas ffa fff ffg ffn ffo ffp ffr ffs fga fgf fgg fgn fgp fgr fgs fna fnf fng fnn fnp fnr fns foa fof fog fon foo fop for fos fpa fpg fpn fpo fpp fpr fps fra frf frg frn fro frp frr frs fsa fsf fsg fsn fso fsp fsr fss g-p gaa gaf gag gan gao gap gar gas gfa gff gfo gfp gfr gfs gga ggg ggn ggo ggp ggr ggs gna gnf gnn gno gnp gnr gns goa gof gog gon goo gop gor gos gpa gpf gpg gpn gpo gpp gpr gps gra grf grg grn gro grp grr grs gsa gsf gsg gsn gso gsp gsr gss naa naf nag nan nao nap nar nas nfa nff nfn nfo nfp nfr nfs nga ngf ngg ngn ngo ngp ngs nna nnf nng nnn nno nnp nns no- noa nof nog non noo nop nor nos npa npf npg npn npo npp npr nps nra nrf nrg nrn nro nrp nrr nrs nsa nsf nsg nsn nso nsp nsr nss oaa oaf oag oan oao oap oar oas of- ofa off ofg ofn ofo ofp ofr ofs oga ogf ogg ogn ogo ogp ogs on- ona onf ong onn ono onp onr ons oo- ooa oof oog oon ooo oop oor oos op- opa opf opg opn opo opp opr ops or- ora orf org orn oro orp orr ors os- osa osf osg osn oso osp osr oss p-p paa paf pag pan pao pap par pas pfa pff pfg pfn pfo pfp pfr pfs pga pgf pgg pgn pgo pgp pgr pgs pn- pna pnf png pnn pno pnp pnr pns poa pof pog pon poo pop por pos ppa ppf ppg ppn ppo ppp ppr pps pra prf prg prn pro prp prr prs ps- psa psf psg psn pso psp psr pss ra- raa raf rag ran rao rap rar ras rfa rff rfg rfn rfo rfp rfr rfs rga rgf rgg rgn rgo rgp rgr rgs rna rng rnn rno rnp rnr rns roa rof rog ron roo rop ror ros rpa rpf rpg rpn rpo rpp rpr rps rra rrf rrg rrn rrp rrr rrs rsa rsf rsg rsn rso rsp rsr rss saa saf sag san sao sap sar sas sfa sff sfg sfn sfo sfp sfr sfs sga sgf sgg sgn sgo sgp sgr sgs sna snf sng snn sno snp snr sns soa sof sog son soo sop sor sos spa spf spg spn spo spp spr sps sr- sra srf srg srn sro srp srr srs ss- ssa ssf ssg ssn sso ssp ssr sss