-al a-a a-b a-t aaa aab aad aae aak aal aat ab- aba abb abd abe abk abl abt ad- ada adb add ade adk adl adt aea aeb aed aee aek ael aet aka akb akd ake akk akl al- ala alb ald ale alk all alt at- ata atb atd ate atl att baa bab bad bae bak bal bat bba bbb bbd bbe bbk bbl bbt bda bdb bdd bde bdk bdl bdt be- bea beb bed bee bek bel bet bka bkb bke bkk bkl bkt bla blb bld ble blk bll blt bta btb btd bte btk btl btt daa dab dad dae dak dal dat dba dbb dbd dbe dbk dbl dbt dda ddb ddd dde ddk ddl ddt de- dea deb ded dee dek del det dka dkb dke dkk dkl dkt dl- dla dlb dld dle dlk dll dlt dta dtb dtd dte dtk dtl dtt eaa eab ead eae eak eal eat eba ebb ebd ebe ebk ebl ebt ed- eda edb edd ede edk edl edt eea eeb eed eee eek eel eet eka ekb ekd eke ekl ekt ela elb eld ele elk ell elt eta etb etd ete etk etl ett k-t ka- kaa kab kad kae kak kal kat kba kbb kbd kbe kbk kbl kda kdb kde kdk kdl kdt ke- kea keb ked kee kek kel ket kkb kke kkk kkl kkt kl- kla klb kld klt kta ktb kte ktk ktl ktt la- laa lab lad lae lak lal lat lba lbb lbd lbe lbk lbl lbt lda ldb ldd lde ldk ldl ldt lea leb led lee lek lel let lka lkb lkl lkt lla llb lld lle llk lll llt lta ltb ltd lte ltk ltl ltt taa tab tad tae tak tal tat tba tbb tbd tbe tbk tbl tbt tda tdb tdd tde tdk tdl tdt te- tea teb ted tee tek tel tet tka tkb tke tkk tkl tkt tla tld tle tlk tll tlt tta ttb ttd tte ttk ttl ttt