-al a-a a-b aaa aab aak aal aan ab- aba abb abk abl abn aka akb akk akl akn al- ala alb alk all aln an- ana anb ank anl ann baa bab bak bal ban bba bbb bbk bbl bbn bka bkb bkk bkl bkn bla blb blk bll bln bna bnb bnk bnl bnn ka- kaa kab kak kal kan kba kbb kbk kbl kbn kkb kkk kkl kkn kl- kla klb kn- kna knk knl knn la- laa lab lak lal lan lba lbb lbk lbl lka lkb lkl lla llb llk lll lln lna lnb lnk lnl lnn naa nab nak nal nan nba nbb nbk nbl nbn nka nkk nkn nla nlb nlk nll nln nna nnb nnk nnl nnn