-al a-a a-b aaa aab aad aae aak aal ab- aba abb abd abe abk abl ad- ada adb add ade adk adl aea aeb aed aee aek ael aka akb akd ake akk akl al- ala alb ald ale alk all baa bab bad bae bak bal bba bbb bbd bbe bbk bbl bda bdb bdd bde bdk bdl be- bea beb bed bee bek bel bka bkb bke bkk bkl bla blb bld ble blk bll daa dab dad dae dak dal dba dbb dbd dbe dbk dbl dda ddb ddd dde ddk ddl de- dea deb ded dee dek del dka dkb dke dkk dkl dl- dla dlb dld dle dlk dll eaa eab ead eae eak eal eba ebb ebd ebe ebk ebl ed- eda edb edd ede edk edl eea eeb eed eee eek eel eka ekb ekd eke ekl ela elb eld ele elk ell ka- kaa kab kad kae kak kal kba kbb kbd kbe kbk kbl kda kdb kde kdk kdl ke- kea keb ked kee kek kel kkb kke kkk kkl kl- kla klb kld la- laa lab lad lae lak lal lba lbb lbd lbe lbk lbl lda ldb ldd lde ldk ldl lea leb led lee lek lel lka lkb lkl lla llb lld lle llk lll