a-a a-i aaa aaf aag aai aao aap aar af- afa aff afg afi afo afp afr ag- aga agf agg agi ago agp agr ai- aia aif aig aii aio aip air aoa aof aog aoi aoo aop aor ap- apa apf apg api apo app apr ar- ara arf arg ari aro arp arr faa faf fag fai fao fap far ffa fff ffg ffi ffo ffp ffr fga fgf fgg fgi fgp fgr fia fif fig fii fip fir foa fof fog foi foo fop for fpa fpg fpi fpo fpp fpr fra frf frg fri fro frp frr g-p gaa gaf gag gai gao gap gar gfa gff gfi gfo gfp gfr gga ggg ggi ggo ggp ggr gia gif gig gii gio gip gir goa gof gog goi goo gop gor gpa gpf gpg gpi gpo gpp gpr gra grf grg gri gro grp grr i-f ia- iaa iaf iag iai iao iap iar ifa iff ifg ifi ifo ifp ifr iga igf igg igi igo igp igr iia iif iii iio iip iir io- ioa iof iog ioi ioo iop ior ipa ipf ipg ipi ipo ipp ipr ir- ira irf irg iri iro irp irr o-i oaa oaf oag oai oao oap oar of- ofa off ofg ofi ofo ofp ofr oga ogf ogg ogi ogo ogp oia oif oii oio oip oir oo- ooa oof oog ooi ooo oop oor op- opa opf opg opi opo opp opr or- ora orf org ori oro orp orr p-p paa paf pag pai pao pap par pfa pff pfg pfi pfo pfp pfr pga pgf pgg pgi pgo pgp pgr pia pif pig pii pio pip pir poa pof pog poi poo pop por ppa ppf ppg ppi ppo ppp ppr pra prf prg pri pro prp prr ra- raa raf rag rai rao rap rar rfa rff rfg rfi rfo rfp rfr rga rgf rgg rgi rgo rgp rgr ria rif rig rii rio rip rir roa rof rog roi roo rop ror rpa rpf rpg rpi rpo rpp rpr rra rrf rrg rri rrp rrr