-al a-a a-b aaa aab aak aal aan aas ab- aba abb abk abl abn abs aka akb akk akl akn aks al- ala alb alk all aln als an- ana anb ank anl ann ans as- asa asb ask asl asn ass baa bab bak bal ban bas bba bbb bbk bbl bbn bbs bka bkb bkk bkl bkn bks bla blb blk bll bln bls bna bnb bnk bnl bnn bns bsa bsb bsk bsl bsn bss ka- kaa kab kak kal kan kas kba kbb kbk kbl kbn kbs kkb kkk kkl kkn kks kl- kla klb kls kn- kna knk knl knn ksa ksb ksk ksl ksn kss la- laa lab lak lal lan las lba lbb lbk lbl lbs lka lkb lkl lks lla llb llk lll lln lls lna lnb lnk lnl lnn lns lsa lsb lsk lsl lsn lss naa nab nak nal nan nas nba nbb nbk nbl nbn nbs nka nkk nkn nks nla nlb nlk nll nln nls nna nnb nnk nnl nnn nns nsa nsb nsk nsl nsn nss saa sab sak sal san sas sba sbb sbk sbl sbn sbs sk- ska skb skk skl sks sla slb slk sll sln sls sna snb snk snl snn sns ss- ssa ssb ssk ssl ssn sss