-al a-a a-t aaa aaf aal aat aax af- afa aff afl aft afx al- ala alf all alt alx at- ata atf atl att atx ax- axa axl axt axx faa faf fal fat fax ffa fff ffl fft ffx fla flf fll flt flx fta ftf ftl ftt ftx fxt fxx la- laa laf lal lat lax lfa lff lfl lft lfx lla llf lll llt lta ltf ltl ltt ltx lxx t-x taa taf tal tat tax tfa tff tfl tft tfx tla tlf tll tlt tlx tta ttf ttl ttt ttx txf txl txt xaa xaf xal xat xfa xfl xft xfx xla xlf xlt xtf xtx xxl xxx