-er a-a aaa aae aam aao aar aas aax aea aee aem aeo aer aes aex ama ame amm amo amr ams amx aoa aoe aom aoo aor aos aox ar- ara are arm aro arr ars arx as- asa ase asm aso asr ass asx ax- axa axe axm axo axr axs axx eaa eae eam eao ear eas eax eea eee eem eeo eer ees eex em- ema eme emm emo emr ems emx eo- eoa eoe eom eoo eor eos era ere erm ero err ers es- esa ese esm eso esr ess esx ex- exa exe exo exr exs exx m-o m-r maa mae mam mao mar mas max mea mee mem meo mer mes mex mma mme mmm mmo mmr mms mmx moa moe mom moo mor mos mox mra mre mrm mro mrr mrs mrx msa mse msm mso msr mss msx mxa mxr mxs oaa oae oam oao oar oas oax oea oee oem oeo oer oes oex om- oma ome omm omo omr oms omx oo- ooa oom ooo oor oos oox or- ora ore orm oro orr ors orx os- osa ose osm oso osr oss osx ox- oxa oxo oxx ra- raa rae ram rao rar ras rax re- rea ree rem reo rer res rex rma rme rmm rmo rmr rms rmx roa roe rom roo ror ros rox rra rrm rrr rrs rsa rse rsm rso rsr rss rsx rxr rxs saa sae sam sao sar sas sax se- sea see sem seo ser ses sex sma sme smm smo smr sms smx soa soe som soo sor sos sox sr- sra sre srm sro srr srs srx ss- ssa sse ssm sso ssr sss ssx sxm sxs xaa xam xar xas xee xem xer xes xex xma xmm xmo xmr xms xmx xoa xom xoo xor xos xox xrx xsa xsm xss xxo xxx