c-- ccc ccd cce ccf ccn cct cdc cdd cde cdf cdn cdt ce- cec ced cee cef cen cet cfc cfd cfe cff cfn cft cn- cnc cnd cne cnf cnn cnt ctc ctd cte ctf ctn ctt dcc dcd dce dcf dcn dct ddc ddd dde ddf ddn ddt de- dec ded dee def den det dfc dfd dfe dff dfn dft dnc dnd dne dnf dnn dnt dtc dtd dte dtf dtn dtt ec- ecc ecd ece ecf ecn ect ed- edc edd ede edf edn edt eec eed eee eef een eet ef- efc efd efe eff eft en- enc end ene enf enn ent etc etd ete etf etn ett fcc fcd fce fcf fcn fct fdc fdd fde fdf fdn fdt fec fed fee fef fen fet ffc ffd ffe fff ffn fft fnc fnd fne fnf fnn fnt ftc ftd fte ftf ftn ftt ncc ncd nce ncf ncn nct ndc ndd nde ndf ndn ndt ne- nec ned nee nef nen net nfc nfd nfe nff nfn nft nnc nne nnf nnn nnt ntc ntd nte ntf ntn ntt tcc tcd tce tcf tcn tct tdc tdd tde tdf tdn tdt te- tec ted tee tef ten tet tfc tfd tfe tff tfn tft tnc tnd tne tnf tnn tnt ttc ttd tte ttf ttn ttt