c-- ccc ccd cce ccn cct cdc cdd cde cdn cdt ce- cec ced cee cen cet cn- cnc cnd cne cnn cnt ctc ctd cte ctn ctt dcc dcd dce dcn dct ddc ddd dde ddn ddt de- dec ded dee den det dnc dnd dne dnn dnt dtc dtd dte dtn dtt ec- ecc ecd ece ecn ect ed- edc edd ede edn edt eec eed eee een eet en- enc end ene enn ent etc etd ete etn ett ncc ncd nce ncn nct ndc ndd nde ndn ndt ne- nec ned nee nen net nnc nne nnn nnt ntc ntd nte ntn ntt tcc tcd tce tcn tct tdc tdd tde tdn tdt te- tec ted tee ten tet tnc tnd tne tnn tnt ttc ttd tte ttn ttt