-er a-a a-i aaa aae aag aai aao aap aar aax aea aee aeg aei aeo aep aer aex ag- aga age agg agi ago agp agr agx ai- aia aie aig aii aio aip air aix aoa aoe aog aoi aoo aop aor aox ap- apa ape apg api apo app apr apx ar- ara are arg ari aro arp arr arx ax- axa axe axi axo axp axr axx eaa eae eag eai eao eap ear eax eea eee eeg eeo eep eer eex ega ege egg egi ego egp egr egx eia eie eig eii eio eip eir eix eo- eoa eoe eog eoi eoo eop eor ep- epa epe epg epi epo epp epr epx era ere erg eri ero erp err ex- exa exe exi exo exp exr exx g-p gaa gae gag gai gao gap gar ge- gea gee geg gei geo gep ger gex gga ggg ggi ggo ggp ggr gia gie gig gii gio gip gir goa goe gog goi goo gop gor gox gpa gpe gpg gpi gpo gpp gpr gpx gra gre grg gri gro grp grr grx gxa gxp ia- iaa iae iag iai iao iap iar ie- iea iee ieg iei iep ier iex iga ige igg igi igo igp igr iia iie iii iio iip iir iix io- ioa ioe iog ioi ioo iop ior ipa ipe ipg ipi ipo ipp ipr ipx ir- ira ire irg iri iro irp irr irx ixe ixi o-i oaa oae oag oai oao oap oar oax oea oee oeg oei oeo oep oer oex oga oge ogg ogi ogo ogp ogx oia oie oii oio oip oir oo- ooa oog ooi ooo oop oor oox op- opa ope opg opi opo opp opr opx or- ora ore org ori oro orp orr orx ox- oxa oxi oxo oxx p-p paa pae pag pai pao pap par pax pea pee peg pei peo pep per pex pga pge pgg pgi pgo pgp pgr pia pie pig pii pio pip pir pix poa poe pog poi poo pop por pox ppa ppe ppg ppi ppo ppp ppr ppx pra pre prg pri pro prp prr prx pxe pxg pxr ra- raa rae rag rai rao rap rar rax re- rea ree reg rei reo rep rer rex rga rge rgg rgi rgo rgp rgr rgx ria rie rig rii rio rip rir rix roa roe rog roi roo rop ror rox rpa rpe rpg rpi rpo rpp rpr rpx rra rrg rri rrp rrr rxp rxr xaa xag xap xar xee xeg xep xer xex xge xgi xgp xia xie xii xio xix xoa xog xoi xoo xop xor xox xpa xpe xpg xpo xpp xrx xxi xxo xxp xxx