    18
 geometry
 C                     0.71669950     0.00000000     0.00000000
 C                    -0.71669950     0.00000000     0.00000000
 C                     1.40321474     1.23706946     0.00000000
 C                    -1.40321474    -1.23706946     0.00000000
 C                    -1.40321474     1.23706946     0.00000000
 C                     1.40321474    -1.23706946     0.00000000
 C                     0.69672094     2.45427722     0.00000000
 C                    -0.69672094    -2.45427722     0.00000000
 C                    -0.69672094     2.45427722     0.00000000
 C                     0.69672094    -2.45427722     0.00000000
 H                     2.49021403     1.24490761     0.00000000
 H                    -2.49021403    -1.24490761     0.00000000
 H                    -2.49021403     1.24490761     0.00000000
 H                     2.49021403    -1.24490761     0.00000000
 H                     1.24355156     3.39209529     0.00000000
 H                    -1.24355156    -3.39209529     0.00000000
 H                    -1.24355156     3.39209529     0.00000000
 H                     1.24355156    -3.39209529     0.00000000
