-ey a-a a-i aaa aae aaf aai aas aax aay aea aee aef aei aes aex aey af- afa afe aff afi afs afx afy ai- aia aie aif aii ais aix aiy as- asa ase asf asi ass asx asy ax- axa axe axi axs axx ay- aya aye ayf ayi ays ayx eaa eae eaf eai eas eax eea eee eef ees eex eey ef- efa efe eff efi efs efx eia eie eif eii eis eix es- esa ese esf esi ess esx esy ex- exa exe exi exs exx exy eya eye eys faa fae faf fai fas fax fay fea fee fef fei fes fex fey ffa ffe fff ffi ffs ffx ffy fia fie fif fii fis fix fsa fse fsf fsi fss fsx fxe fxi fxs fxx fy- fya fye fyi i-f ia- iaa iae iaf iai ias ie- iea iee ief iei ies iex iey ifa ife iff ifi ifs ifx ify iia iie iif iii iis iix is- isa ise isf isi iss isy ixe ixi ixy iya iye iys iyy saa sae saf sai sas sax say se- sea see sef sei ses sex sey sfa sfe sff sfi sfs sfx sia sie sif sii sis six ss- ssa sse ssf ssi sss ssx sxi sxs sy- sya sye syi sys syx xaa xaf xas xee xes xex xfa xfe xfs xfx xia xie xii xis xix xsa xsi xss xxi xxx xxy xyy yaa yae yaf yai yas yax yay yea yee yef yei yes yex yey yfa yfe yff yfs yie yif yii yis ysa yse ysi yss ysy yxa yxe yxy yye yyf yys yyy