-ey eee eef eem een ees eey ef- efe eff efm efs em- eme emf emm emn ems en- ene enf enm enn ens eny es- ese esf esm esn ess esy eye eym eyn eys fee fef fem fen fes fey ffe fff ffm ffn ffs ffy fme fmf fmm fmn fms fne fnf fnm fnn fns fse fsf fsm fsn fss fy- fye fyn m-f mee mef mem men mes mey mfe mff mfm mfn mfs mfy mme mmf mmm mmn mms mne mnf mnm mnn mns mse msf msm msn mss msy my- mye myf mym myn mys ne- nee nef nem nen nes ney nfe nff nfn nfs nme nmm nmn nms nne nnf nnm nnn nns nse nsf nsm nsn nss nsy nye nyf nym nyn nys nyy se- see sef sem sen ses sey sfe sff sfm sfn sfs sme smf smm smn sms smy sne snf snm snn sns sny ss- sse ssf ssm ssn sss sy- sye sym syn sys yee yef yem yen yes yey yfe yff yfm yfs yme ymm yms yne ynn yns yny yse ysm yss ysy yye yyf yys yyy