-al a-a a-b aaa aab aak aal aan aar ab- aba abb abk abl abn abr aka akb akk akl akn akr al- ala alb alk all aln alr an- ana anb ank anl ann anr ar- ara arb ark arl arn arr baa bab bak bal ban bar bba bbb bbk bbl bbn bbr bka bkb bkk bkl bkn bkr bla blb blk bll bln blr bna bnb bnk bnl bnn bnr bra brb brk brl brn brr ka- kaa kab kak kal kan kar kba kbb kbk kbl kbn kbr kkb kkk kkl kkn kkr kl- kla klb klr kn- kna knk knl knn knr kra krk krl krn krr la- laa lab lak lal lan lar lba lbb lbk lbl lbr lka lkb lkl lkr lla llb llk lll lln llr lna lnb lnk lnl lnn lnr lra lrb lrk lrn lrr naa nab nak nal nan nar nba nbb nbk nbl nbn nbr nka nkk nkn nkr nla nlb nlk nll nln nlr nna nnb nnk nnl nnn nra nrb nrk nrl nrn nrr ra- raa rab rak ral ran rar rba rbb rbk rbl rbn rbr rkb rkk rla rll rln rlr rna rnb rnn rnr rra rrb rrk rrl rrn rrr