    18
 geometry
 C                     0.00000000     0.00000000    -2.50705181
 C                     0.00000000     1.28835735    -1.91344517
 C                     0.00000000    -1.28835735    -1.91344517
 C                     0.00000000    -1.62439016    -0.55820024
 C                     0.00000000     1.62439016    -0.55820024
 C                     0.00000000    -0.73844126     0.54155337
 C                     0.00000000     0.73844126     0.54155337
 C                     0.00000000     1.16311928     1.90313434
 C                     0.00000000    -1.16311928     1.90313434
 C                     0.00000000     0.00000000     2.74014619
 H                     0.00000000     0.00000000    -3.59670449
 H                     0.00000000    -2.12304073    -2.61181807
 H                     0.00000000     2.12304073    -2.61181807
 H                     0.00000000    -2.68764229    -0.32245936
 H                     0.00000000     2.68764229    -0.32245936
 H                     0.00000000     2.19153112     2.25261213
 H                     0.00000000    -2.19153112     2.25261213
 H                     0.00000000     0.00000000     3.82726254
