# type topo
# cell     2.730300     2.730300     2.584900    90.000000    90.000000   120.000000
18
  1 i     -0.865096    2.075803    0.408156   0                             2/16       3/4      5/15       6/3      11/4     12/16     16/13 
  2 i      0.000000    0.577413    0.408156   0                             1/10       3/1       4/3      5/12     10/13      11/4     18/13 
  3 i      0.865096    2.075803    0.408156   0                             1/22      2/25      4/15      6/12     10/13     12/16     17/13 
  4 i      2.230246    0.288707    2.176744   0                             2/23      3/11      5/22      6/10      7/13     14/10     15/22 
  5 i      0.500054    0.288707    2.176744   0                             1/11      2/14       4/4       6/1      9/13     13/13     14/10 
  6 i      1.365150    1.787096    2.176744   0                             1/23      3/14      4/16      5/25      8/13     13/13     15/22 
  7 i      1.865204    0.499463    1.269789   0                             4/13      8/13      9/13     11/13     12/13     17/10     18/22 
  8 i      1.365150    1.365583    1.269789   0                             6/13      7/13      9/13     10/13     11/13     16/22     17/13 
  9 i      0.865096    0.499463    1.269789   0                             5/13      7/13      8/13     10/13     12/13     16/10     18/13 
 10 i      0.865096    1.076876    0.453478   0                             2/13      3/13      8/13      9/13     11/13     12/13     13/12 
 11 i      1.865204    1.076876    0.453478   0                             1/22      2/22      7/13      8/13     10/13     12/13     15/21 
 12 i      1.365150    0.210757    0.453478   0                             1/10      3/10      7/13      9/13     10/13     11/13      14/9 
 13 i      0.500054    1.287633    2.131422   0                             5/13      6/13     10/14     14/13     15/13     17/13     18/13 
 14 i     -0.000000    2.153753    2.131422   0                             4/16      5/16     12/17     13/13     15/13     16/13     17/13 
 15 i     -0.500054    1.287633    2.131422   0                              4/4       6/4      11/5     13/13     14/13     16/13     18/13 
 16 i     -0.500054    1.865046    1.315111   0                             1/13       8/4      9/16     14/13     15/13     17/13     18/13 
 17 i      0.500054    1.865046    1.315111   0                             3/13      7/16      8/13     13/13     14/13     16/13     18/13 
 18 i     -0.000000    0.998926    1.315111   0                             2/13       7/4      9/13     13/13     15/13     16/13     17/13