-al a-a a-b a-i aaa aab aai aal aan aar aax ab- aba abb abi abl abn abr abx ai- aia aib aii ail ain air aix al- ala alb ali all aln alr alx an- ana anb ani anl ann anr anx ar- ara arb ari arl arn arr arx ax- axa axi axl axn axr axx baa bab bai bal ban bar bax bba bbb bbi bbl bbn bbr bbx bi- bia bib bii bil bin bir bix bla blb bli bll bln blr blx bna bnb bni bnl bnn bnr bnx bra brb bri brl brn brr brx bxb bxi bxl bxn bxx ia- iaa iab iai ial ian iar iba ibb ibi ibl ibn ibr ibx iia iib iii iil iin iir iix il- ila ilb ili ill iln ilr ilx in- ina inb ini inl inn inr inx ir- ira irb iri irl irn irr irx ixi ixl ixn la- laa lab lai lal lan lar lax lba lbb lbi lbl lbr lbx lia lib lii lil lin lir lix lla llb lli lll lln llr lna lnb lni lnl lnn lnr lra lrb lri lrn lrr lxi lxr lxx n-i naa nab nai nal nan nar nax nba nbb nbi nbl nbn nbr nbx nia nib nii nil nin nir nix nla nlb nli nll nln nlr nlx nna nnb nni nnl nnn nra nrb nri nrl nrn nrr nrx nxl ra- raa rab rai ral ran rar rax rba rbb rbi rbl rbn rbr rbx ria rib rii ril rin rir rix rla rli rll rln rlr rna rnb rni rnn rnr rra rrb rri rrl rrn rrr rxr xaa xal xan xar xbl xbr xbx xia xii xin xix xla xlb xli xlr xna xrx xxi xxl xxx