-er a-a aaa aae aaf aam aao aar aas aax aea aee aef aem aeo aer aes aex af- afa afe aff afm afo afr afs afx ama ame amf amm amo amr ams amx aoa aoe aof aom aoo aor aos aox ar- ara are arf arm aro arr ars arx as- asa ase asf asm aso asr ass asx ax- axa axe axm axo axr axs axx eaa eae eaf eam eao ear eas eax eea eee eef eem eeo eer ees eex ef- efa efe eff efm efo efr efs efx em- ema eme emf emm emo emr ems emx eo- eoa eoe eof eom eoo eor eos era ere erf erm ero err ers es- esa ese esf esm eso esr ess esx ex- exa exe exo exr exs exx faa fae faf fam fao far fas fax fea fee fef fem feo fer fes fex ffa ffe fff ffm ffo ffr ffs ffx fma fme fmf fmm fmo fmr fms fmx foa foe fof fom foo for fos fox fra fre frf frm fro frr frs fsa fse fsf fsm fso fsr fss fsx fxe fxm fxr fxs fxx m-f m-o m-r maa mae maf mam mao mar mas max mea mee mef mem meo mer mes mex mfa mfe mff mfm mfo mfr mfs mma mme mmf mmm mmo mmr mms mmx moa moe mof mom moo mor mos mox mra mre mrf mrm mro mrr mrs mrx msa mse msf msm mso msr mss msx mxa mxr mxs oaa oae oaf oam oao oar oas oax oea oee oef oem oeo oer oes oex of- ofa ofe off ofm ofo ofr ofs ofx om- oma ome omf omm omo omr oms omx oo- ooa oof oom ooo oor oos oox or- ora ore orf orm oro orr ors orx os- osa ose osf osm oso osr oss osx ox- oxa oxf oxo oxx ra- raa rae raf ram rao rar ras rax re- rea ree ref rem reo rer res rex rfa rfe rff rfm rfo rfr rfs rma rme rmf rmm rmo rmr rms rmx roa roe rof rom roo ror ros rox rra rrf rrm rrr rrs rsa rse rsf rsm rso rsr rss rsx rxr rxs saa sae saf sam sao sar sas sax se- sea see sef sem seo ser ses sex sfa sfe sff sfm sfo sfr sfs sfx sma sme smf smm smo smr sms smx soa soe sof som soo sor sos sox sr- sra sre srf srm sro srr srs srx ss- ssa sse ssf ssm sso ssr sss ssx sxm sxs xaa xaf xam xar xas xee xem xer xes xex xfa xfe xfm xfs xfx xma xmf xmm xmo xmr xms xmx xoa xof xom xoo xor xos xox xrf xrx xsa xsm xss xxo xxx