-er a-a aaa aae aaf aam aar aas aax aea aee aef aem aer aes aex af- afa afe aff afm afr afs afx ama ame amf amm amr ams amx ar- ara are arf arm arr ars arx as- asa ase asf asm asr ass asx ax- axa axe axm axr axs axx eaa eae eaf eam ear eas eax eea eee eef eem eer ees eex ef- efa efe eff efm efr efs efx em- ema eme emf emm emr ems emx era ere erf erm err ers es- esa ese esf esm esr ess esx ex- exa exe exr exs exx faa fae faf fam far fas fax fea fee fef fem fer fes fex ffa ffe fff ffm ffr ffs ffx fma fme fmf fmm fmr fms fmx fra fre frf frm frr frs fsa fse fsf fsm fsr fss fsx fxe fxm fxr fxs fxx m-f m-r maa mae maf mam mar mas max mea mee mef mem mer mes mex mfa mfe mff mfm mfr mfs mma mme mmf mmm mmr mms mmx mra mre mrf mrm mrr mrs mrx msa mse msf msm msr mss msx mxa mxr mxs ra- raa rae raf ram rar ras rax re- rea ree ref rem rer res rex rfa rfe rff rfm rfr rfs rma rme rmf rmm rmr rms rmx rra rrf rrm rrr rrs rsa rse rsf rsm rsr rss rsx rxr rxs saa sae saf sam sar sas sax se- sea see sef sem ser ses sex sfa sfe sff sfm sfr sfs sfx sma sme smf smm smr sms smx sr- sra sre srf srm srr srs srx ss- ssa sse ssf ssm ssr sss ssx sxm sxs xaa xaf xam xar xas xee xem xer xes xex xfa xfe xfm xfs xfx xma xmf xmm xmr xms xmx xrf xrx xsa xsm xss xxx