-al a-a a-b a-t aaa aab aae aak aal aat ab- aba abb abe abk abl abt aea aeb aee aek ael aet aka akb ake akk akl al- ala alb ale alk all alt at- ata atb ate atl att baa bab bae bak bal bat bba bbb bbe bbk bbl bbt be- bea beb bee bek bel bet bka bkb bke bkk bkl bkt bla blb ble blk bll blt bta btb bte btk btl btt eaa eab eae eak eal eat eba ebb ebe ebk ebl ebt eea eeb eee eek eel eet eka ekb eke ekl ekt ela elb ele elk ell elt eta etb ete etk etl ett k-t ka- kaa kab kae kak kal kat kba kbb kbe kbk kbl ke- kea keb kee kek kel ket kkb kke kkk kkl kkt kl- kla klb klt kta ktb kte ktk ktl ktt la- laa lab lae lak lal lat lba lbb lbe lbk lbl lbt lea leb lee lek lel let lka lkb lkl lkt lla llb lle llk lll llt lta ltb lte ltk ltl ltt taa tab tae tak tal tat tba tbb tbe tbk tbl tbt te- tea teb tee tek tel tet tka tkb tke tkk tkl tkt tla tle tlk tll tlt tta ttb tte ttk ttl ttt