-ic c-- ccc cce ccf cci cco ccx ce- cec cee cef cei ceo cex cfc cfe cff cfi cfo cfx ci- cic cie cif cii cio cix co- coc coe cof coi coo cox cxc cxf cxi cxo cxx ec- ecc ece ecf eci eco ecx eec eee eef eeo eex ef- efc efe eff efi efo efx eic eie eif eii eio eix eo- eoc eoe eof eoi eoo ex- exc exe exi exo exx fcc fce fcf fci fco fcx fec fee fef fei feo fex ffc ffe fff ffi ffo ffx fic fie fif fii fix foc foe fof foi foo fox fxe fxi fxx i-f icc ice icf ici ico ie- iec iee ief iei iex ifc ife iff ifi ifo ifx iic iie iif iii iio iix io- ioc ioe iof ioi ioo ixc ixe ixi o-i oc- occ ocf oci oco ocx oec oee oef oei oeo oex of- ofc ofe off ofi ofo ofx oic oie oif oii oio oo- ooc oof ooi ooo oox ox- oxc oxf oxi oxo oxx xcf xci xcx xee xex xfe xfx xic xie xii xio xix xoc xof xoi xoo xox xxi xxo xxx