-ol bbb bbf bbi bbl bbn bbo bbt bbx bfb bff bfi bfl bfn bfo bft bfx bi- bib bif bii bil bin bio bit bix blb blf bli bll bln blo blt blx bnb bnf bni bnl bnn bno bnt bnx bob bof boi bol bon boo bot box btb btf bti btl btn bto btt btx bxb bxi bxl bxn bxo bxx fbb fbf fbi fbl fbn fbo fbt fbx fff ffi ffl ffn ffo fft ffx fib fif fii fil fin fit fix flb flf fli fll fln flo flt flx fnb fnf fni fnl fnn fnt fnx fob fof foi fol fon foo fot fox ftb ftf fti ftl ftn fto ftt ftx fxi fxt fxx i-f ibb ibf ibi ibl ibn ibo ibt ibx ifb iff ifi ifl ifn ifo ift ifx iib iif iii iil iin iio iit iix il- ilb ilf ili ill iln ilo ilt ilx in- inb inf ini inl inn ino int inx io- iob iof ioi iol ion ioo iot itb itf iti itl itn ito itt itx ixi ixl ixn lbb lbf lbi lbl lbo lbt lbx lfb lff lfi lfl lfn lfo lft lfx lib lif lii lil lin lio lit lix llb llf lli lll lln llo llt lnb lni lnl lnn lno lnt lob lof loi lol lon loo lot lox ltb ltf lti ltl lto ltt ltx lxi lxo lxx n-i nbb nbf nbi nbl nbn nbo nbt nbx nfb nff nfi nfl nfn nfo nft nib nif nii nil nin nio nit nix nlb nlf nli nll nln nlo nlt nlx nnb nnf nni nnl nnn nno nnt no- nob nof noi nol non noo not nox ntb ntf nti ntn nto ntt ntx nxl nxt o-i ob- obb obf obi obl obn obo obt obx of- ofb off ofi ofl ofn ofo oft ofx oib oif oii oil oin oio oit olb olf oli oll oln olo olt on- onb onf oni onl onn ono ont onx oo- oob oof ooi ool oon ooo oot oox ot- otb otf oti otl otn oto ott ox- oxb oxf oxi oxn oxo oxt oxx t-x tbb tbf tbi tbl tbn tbo tbt tfb tff tfi tfl tfn tfo tft tfx tib tif tii til tin tio tit tix tlf tli tll tln tlo tlt tlx tnb tnf tni tnl tnn tno tnt tnx to- tob tof toi tol ton too tot tox ttb ttf tti ttl ttn tto ttt ttx txf txi txl txn txt xbl xbx xfl xfn xft xfx xii xin xio xit xix xlb xlf xli xlt xno xof xoi xon xoo xot xox xtf xti xtx xxi xxl xxo xxx