-al a-a a-b aaa aab aae aak aal ab- aba abb abe abk abl aea aeb aee aek ael aka akb ake akk akl al- ala alb ale alk all baa bab bae bak bal bba bbb bbe bbk bbl be- bea beb bee bek bel bka bkb bke bkk bkl bla blb ble blk bll eaa eab eae eak eal eba ebb ebe ebk ebl eea eeb eee eek eel eka ekb eke ekl ela elb ele elk ell ka- kaa kab kae kak kal kba kbb kbe kbk kbl ke- kea keb kee kek kel kkb kke kkk kkl kl- kla klb la- laa lab lae lak lal lba lbb lbe lbk lbl lea leb lee lek lel lka lkb lkl lla llb lle llk lll