-al a-a a-b a-i aaa aab aaf aai aal aan ab- aba abb abf abi abl abn af- afa afb aff afi afl afn ai- aia aib aif aii ail ain al- ala alb alf ali all aln an- ana anb anf ani anl ann baa bab baf bai bal ban bba bbb bbf bbi bbl bbn bfa bfb bff bfi bfl bfn bi- bia bib bif bii bil bin bla blb blf bli bll bln bna bnb bnf bni bnl bnn faa fab faf fai fal fan fba fbb fbf fbi fbl fbn ffa fff ffi ffl ffn fia fib fif fii fil fin fla flb flf fli fll fln fna fnb fnf fni fnl fnn i-f ia- iaa iab iaf iai ial ian iba ibb ibf ibi ibl ibn ifa ifb iff ifi ifl ifn iia iib iif iii iil iin il- ila ilb ilf ili ill iln in- ina inb inf ini inl inn la- laa lab laf lai lal lan lba lbb lbf lbi lbl lfa lfb lff lfi lfl lfn lia lib lif lii lil lin lla llb llf lli lll lln lna lnb lni lnl lnn n-i naa nab naf nai nal nan nba nbb nbf nbi nbl nbn nfa nfb nff nfi nfl nfn nia nib nif nii nil nin nla nlb nlf nli nll nln nna nnb nnf nni nnl nnn