# type topo
# cell     3.666700     3.666700     1.633000    90.000000    90.000000   120.000000
18
  1 i      0.000000    0.577298    0.408250   0                              2/1      3/10      4/13      4/12       6/4       6/3     17/13 
  2 i      1.333395    2.886806    0.408250   0                             1/25      3/22      5/13      5/12      6/16      6/15     16/13 
  3 i     -1.333395    2.886806    0.408250   0                             1/16       2/4      4/16      4/15       5/3       5/4     18/13 
  4 i      0.499955    0.288649    1.224750   0                             1/13      1/14      3/10      3/11       5/1       6/4      8/13 
  5 i      1.833350    2.598158    1.224750   0                             2/13      2/14      3/23      3/22      4/25      6/16      7/13 
  6 i      3.166745    0.288649    1.224750   0                             1/22      1/23      2/10      2/11      4/22      5/10      9/13 
  7 i      1.833350    1.635783    0.952583   0                             5/13      8/13      9/13     10/13     10/14     12/13     12/14 
  8 i      1.333395    0.769836    0.952583   0                             4/13      7/13      9/13     11/13     11/14     12/13     12/14 
  9 i      2.333305    0.769836    0.952583   0                             6/13      7/13      8/13     10/13     10/14     11/13     11/14 
 10 i      2.333305    1.347134    0.136083   0                             7/13      7/12      9/13      9/12     11/13     12/13     14/21 
 11 i      1.833350    0.481187    0.136083   0                             8/13      8/12      9/13      9/12     10/13     12/13      13/9 
 12 i      1.333395    1.347134    0.136083   0                             7/13      7/12      8/13      8/12     10/13     11/13     15/12 
 13 i     -0.000000    2.694268    1.496917   0                            11/17     14/13     15/13     16/14     16/13     18/14     18/13 
 14 i     -0.499955    1.828321    1.496917   0                             10/5     13/13     15/13     17/14     17/13     18/14     18/13 
 15 i      0.499955    1.828321    1.496917   0                            12/14     13/13     14/13     16/14     16/13     17/14     17/13 
 16 i      0.499955    2.405619    0.680417   0                             2/13     13/12     13/13     15/12     15/13     17/13     18/13 
 17 i     -0.000000    1.539672    0.680417   0                             1/13     14/12     14/13     15/12     15/13     16/13     18/13 
 18 i     -0.499955    2.405619    0.680417   0                             3/13     13/12     13/13     14/12     14/13     16/13     17/13