%%MatrixMarket matrix coordinate complex symmetric
%  2   3   0   0   0
%  3   0  -1   0   6
%  0  -1   0   2   0
%  0   0   2   3   0
%  0   6   0   0   1
5 5 7
  1 1  2  1
  2 1  3  2
  3 2 -1  3
  4 3  2  4
  4 4  3  5
  5 2  6  6
  5 5  1  7