a-a a-i a-t aaa aae aaf aai aat aax aea aee aef aei aet aex af- afa afe aff afi aft afx ai- aia aie aif aii ait aix at- ata ate atf ati att atx ax- axa axe axi axt axx eaa eae eaf eai eat eax eea eee eef eet eex ef- efa efe eff efi eft efx eia eie eif eii eit eix eta ete etf eti ett etx ex- exa exe exi ext exx faa fae faf fai fat fax fea fee fef fei fet fex ffa ffe fff ffi fft ffx fia fie fif fii fit fix fta fte ftf fti ftt ftx fxe fxi fxt fxx i-f ia- iaa iae iaf iai iat ie- iea iee ief iei iet iex ifa ife iff ifi ift ifx iia iie iif iii iit iix ita ite itf iti itt itx ixe ixi t-x taa tae taf tai tat tax te- tea tee tef tei tet tex tfa tfe tff tfi tft tfx tia tie tif tii tit tix tta tte ttf tti ttt ttx txe txf txi txt xaa xaf xat xee xet xex xfa xfe xft xfx xia xie xii xit xix xtf xti xtx xxi xxx