 18

  C    1.818481   -1.749908    0.000000
  C    1.818481   -0.350021    0.000000
  C    0.606155   -2.449844    0.000000
  C   -0.606171   -1.749908    0.000000
  C   -0.606171   -0.349930    0.000000
  C    0.606155    0.349915    0.000000
  H   -1.541458   -2.289902    0.000000
  C   -1.818497    0.350006    0.000000
  C    0.606155    1.749893    0.000000
  C   -0.606171    2.449829    0.000000
  C   -1.818497    1.749878    0.000000
  H   -2.753784   -0.190002    0.000000
  H    1.541458    2.289871    0.000000
  H   -0.606171    3.529816    0.000000
  H   -2.753784    2.289856    0.000000
  H    2.753769    0.189957    0.000000
  H    2.753769   -2.289886    0.000000
  H    0.606155   -3.529816    0.000000
