-ic c-- ccc ccf cci cct ccx cfc cff cfi cft cfx ci- cic cif cii cit cix ctc ctf cti ctt ctx cxc cxf cxi cxt cxx fcc fcf fci fct fcx ffc fff ffi fft ffx fic fif fii fit fix ftc ftf fti ftt ftx fxi fxt fxx i-f icc icf ici ict ifc iff ifi ift ifx iic iif iii iit iix itc itf iti itt itx ixc ixi t-x tcc tcf tci tct tcx tfc tff tfi tft tfx tic tif tii tit tix ttc ttf tti ttt ttx txf txi txt xcf xci xcx xft xfx xic xii xit xix xtc xtf xti xtx xxi xxx