    18
 geometry
 C                     0.00000000     0.00000000    -2.54417769
 C                     0.00000000     1.26442679    -1.93752962
 C                     0.00000000    -1.26442679    -1.93752962
 C                     0.00000000    -1.60008714    -0.55158337
 C                     0.00000000     1.60008714    -0.55158337
 C                     0.00000000    -0.71281660     0.50509200
 C                     0.00000000     0.71281660     0.50509200
 C                     0.00000000     1.12304168     1.94383591
 C                     0.00000000    -1.12304168     1.94383591
 C                     0.00000000     0.00000000     2.76993198
 H                     0.00000000     0.00000000    -3.63250187
 H                     0.00000000    -2.11449066    -2.61853021
 H                     0.00000000     2.11449066    -2.61853021
 H                     0.00000000    -2.66433545    -0.32135973
 H                     0.00000000     2.66433545    -0.32135973
 H                     0.00000000     2.15923909     2.27925667
 H                     0.00000000    -2.15923909     2.27925667
 H                     0.00000000     0.00000000     3.85479070
