-ol bbb bbf bbi bbl bbn bbo bbx bfb bff bfi bfl bfn bfo bfx bi- bib bif bii bil bin bio bix blb blf bli bll bln blo blx bnb bnf bni bnl bnn bno bnx bob bof boi bol bon boo box bxb bxi bxl bxn bxo bxx fbb fbf fbi fbl fbn fbo fbx fff ffi ffl ffn ffo ffx fib fif fii fil fin fix flb flf fli fll fln flo flx fnb fnf fni fnl fnn fnx fob fof foi fol fon foo fox fxi fxx i-f ibb ibf ibi ibl ibn ibo ibx ifb iff ifi ifl ifn ifo ifx iib iif iii iil iin iio iix il- ilb ilf ili ill iln ilo ilx in- inb inf ini inl inn ino inx io- iob iof ioi iol ion ioo ixi ixl ixn lbb lbf lbi lbl lbo lbx lfb lff lfi lfl lfn lfo lfx lib lif lii lil lin lio lix llb llf lli lll lln llo lnb lni lnl lnn lno lob lof loi lol lon loo lox lxi lxo lxx n-i nbb nbf nbi nbl nbn nbo nbx nfb nff nfi nfl nfn nfo nib nif nii nil nin nio nix nlb nlf nli nll nln nlo nlx nnb nnf nni nnl nnn nno no- nob nof noi nol non noo nox nxl o-i ob- obb obf obi obl obn obo obx of- ofb off ofi ofl ofn ofo ofx oib oif oii oil oin oio olb olf oli oll oln olo on- onb onf oni onl onn ono onx oo- oob oof ooi ool oon ooo oox ox- oxb oxf oxi oxn oxo oxx xbl xbx xfl xfn xfx xii xin xio xix xlb xlf xli xno xof xoi xon xoo xox xxi xxl xxo xxx