-al a-a a-b a-i aaa aab aai aal aan aar ab- aba abb abi abl abn abr ai- aia aib aii ail ain air al- ala alb ali all aln alr an- ana anb ani anl ann anr ar- ara arb ari arl arn arr baa bab bai bal ban bar bba bbb bbi bbl bbn bbr bi- bia bib bii bil bin bir bla blb bli bll bln blr bna bnb bni bnl bnn bnr bra brb bri brl brn brr ia- iaa iab iai ial ian iar iba ibb ibi ibl ibn ibr iia iib iii iil iin iir il- ila ilb ili ill iln ilr in- ina inb ini inl inn inr ir- ira irb iri irl irn irr la- laa lab lai lal lan lar lba lbb lbi lbl lbr lia lib lii lil lin lir lla llb lli lll lln llr lna lnb lni lnl lnn lnr lra lrb lri lrn lrr n-i naa nab nai nal nan nar nba nbb nbi nbl nbn nbr nia nib nii nil nin nir nla nlb nli nll nln nlr nna nnb nni nnl nnn nra nrb nri nrl nrn nrr ra- raa rab rai ral ran rar rba rbb rbi rbl rbn rbr ria rib rii ril rin rir rla rli rll rln rlr rna rnb rni rnn rnr rra rrb rri rrl rrn rrr