-ic c-- ccc cce ccf cci cco cct ccx ce- cec cee cef cei ceo cet cex cfc cfe cff cfi cfo cft cfx ci- cic cie cif cii cio cit cix co- coc coe cof coi coo cot cox ctc cte ctf cti cto ctt ctx cxc cxf cxi cxo cxt cxx ec- ecc ece ecf eci eco ect ecx eec eee eef eeo eet eex ef- efc efe eff efi efo eft efx eic eie eif eii eio eit eix eo- eoc eoe eof eoi eoo eot etc ete etf eti eto ett etx ex- exc exe exi exo ext exx fcc fce fcf fci fco fct fcx fec fee fef fei feo fet fex ffc ffe fff ffi ffo fft ffx fic fie fif fii fit fix foc foe fof foi foo fot fox ftc fte ftf fti fto ftt ftx fxe fxi fxt fxx i-f icc ice icf ici ico ict ie- iec iee ief iei iet iex ifc ife iff ifi ifo ift ifx iic iie iif iii iio iit iix io- ioc ioe iof ioi ioo iot itc ite itf iti ito itt itx ixc ixe ixi o-i oc- occ ocf oci oco oct ocx oec oee oef oei oeo oet oex of- ofc ofe off ofi ofo oft ofx oic oie oif oii oio oit oo- ooc oof ooi ooo oot oox ot- otc ote otf oti oto ott ox- oxc oxf oxi oxo oxt oxx t-x tcc tce tcf tci tco tct tcx te- tec tee tef tei teo tet tex tfc tfe tff tfi tfo tft tfx tic tie tif tii tio tit tix to- toc toe tof toi too tot tox ttc tte ttf tti tto ttt ttx txe txf txi txt xcf xci xcx xee xet xex xfe xft xfx xic xie xii xio xit xix xoc xof xoi xoo xot xox xtc xtf xti xtx xxi xxo xxx