1    18  Water Hexamer Ring Structure
2     1  O     -0.810879    1.418888   -2.197601     1     2     3
3     2  H     -0.407351    2.230489   -2.514906     2     1
4     3  H     -1.190544    1.641800   -1.332060     2     1
5     4  O     -1.887487    2.090605    0.245302     1     5     6
6     5  H     -1.458037    1.728162    1.037263     2     4
7     6  H     -2.830041    1.987042    0.397221     2     4
8     7  O     -0.705050    1.068725    2.511503     1     8     9
9     8  H     -0.231294    0.225346    2.426273     2     7
10     9  H     -0.136188    1.626920    3.047252     2     7
11    10  O      0.659675   -1.312960    2.303729     1    11    12
12    11  H      0.256131   -2.124559    2.621016     2    10
13    12  H      1.039348   -1.535865    1.438190     2    10
14    13  O      1.736294   -1.984673   -0.139172     1    14    15
15    14  H      1.306847   -1.622226   -0.931134     2    13
16    15  H      2.678849   -1.881122   -0.291093     2    13
17    16  O      0.553851   -0.962795   -2.405372     1    17    18
18    17  H     -0.015027   -1.520994   -2.941100     2    16
19    18  H      0.080100   -0.119414   -2.320142     2    16
20