18

C    0.835517177   1.115166934   0.021401313
H    1.484323978   1.980608580   0.019534297
C    1.383274965  -0.166147213   0.023765306
H    2.457149016  -0.295204681   0.022771076
C    0.547554655  -1.281316320   0.021685625
H    0.972936101  -2.275804531   0.019778528
C   -0.835523128  -1.115161590   0.021399074
H   -1.484334187  -1.980606395   0.019530093
C   -1.383283584   0.166154134   0.023757746
H   -2.457156177   0.295209058   0.022757066
C   -0.547565766   1.281323471   0.021680249
H   -0.972942841   2.275805478   0.019768726
C    0.655780599  -0.116790479   3.530751741
H    1.047241375  -1.123909307   3.526283475
H    1.370854383   0.693273495   3.526250153
C   -0.655775920   0.116792152   3.530760632
H   -1.370847867  -0.693272366   3.526264544
H   -1.047239029   1.123911050   3.526302434