20
  C    1    1.170639    1.170639    1.170639    1    2    7    8
  C    2    1.894104    0.000000    0.723495    1    1    4    9
  C    3   -1.170639   -1.170639    1.170639    1    6   11   15
  C    4    1.170639   -1.170639    1.170639    1    2    6   10
  C    5   -1.170639    1.170639    1.170639    1    8   11   12
  C    6    0.000000   -0.723495    1.894104    1    3    4    8
  C    7    0.723495    1.894104    0.000000    1    1   12   13
  C    8    0.000000    0.723495    1.894104    1    1    5    6
  C    9    1.894104    0.000000   -0.723495    1    2   13   14
  C   10    0.723495   -1.894104    0.000000    1    4   14   15
  C   11   -1.894104    0.000000    0.723495    1    3    5   16
  C   12   -0.723495    1.894104    0.000000    1    5    7   17
  C   13    1.170639    1.170639   -1.170639    1    7    9   18
  C   14    1.170639   -1.170639   -1.170639    1    9   10   19
  C   15   -0.723495   -1.894104    0.000000    1    3   10   20
  C   16   -1.894104    0.000000   -0.723495    1   11   17   20
  C   17   -1.170639    1.170639   -1.170639    1   12   16   18
  C   18    0.000000    0.723495   -1.894104    1   13   17   19
  C   19    0.000000   -0.723495   -1.894104    1   14   18   20
  C   20   -1.170639   -1.170639   -1.170639    1   15   16   19