# type topo
# cell     3.614700     3.614700     3.614700    90.000000    90.000000    90.000000
28
  1 o      0.000000    0.000000    0.000000   0                              7/4     11/10     15/12      19/9      23/3      27/1 
  2 o      1.807350    0.000000    1.807350   0                             8/10      9/13     14/10     20/13     21/10     26/13 
  3 o      0.000000    1.807350    1.807350   0                             5/13      10/4      16/4      17/4     22/13     28/13 
  4 o      1.807350    1.807350    0.000000   0                             6/12     12/12     13/13     18/13     24/13     25/12 
  5 n      0.205315    2.001821    0.845840   1                             3/13     24/13      27/4 
  6 n      1.602035    1.612879    2.653190   1                             4/14     22/13     26/13 
  7 n      3.409385    0.194471    0.961510   1                             1/22     21/10     28/22 
  8 n      2.012665    3.420229    2.768860   1                             2/16     23/16     25/13 
  9 n      0.845840    0.205315    2.001821   1                             2/13     19/10     28/13 
 10 n      2.653190    1.602035    1.612879   1                             3/22     18/13     26/13 
 11 n      0.961510    3.409385    0.194471   1                             1/16     20/16     25/12 
 12 n      2.768860    2.012665    3.420229   1                             4/14     17/13     27/14 
 13 n      2.001821    0.845840    0.205315   1                             4/13     20/13     23/12 
 14 n      1.612879    2.653190    1.602035   1                             2/16     18/13     22/13 
 15 n      0.194471    0.961510    3.409385   1                             1/14      17/4     24/14 
 16 n      3.420229    2.768860    2.012665   1                             3/22     19/22     21/13 
 17 n      3.409385    1.612879    2.768860   1                             3/22     12/13     15/22 
 18 n      2.012665    2.001821    0.961510   1                             4/13     10/13     14/13 
 19 n      0.205315    3.420229    2.653190   1                             1/17      9/16      16/4 
 20 n      1.602035    0.194471    0.845840   1                             2/13     11/10     13/13 
 21 n      2.768860    3.409385    1.612879   1                             2/16      7/16     16/13 
 22 n      0.961510    2.012665    2.001821   1                             3/13      6/13     14/13 
 23 n      2.653190    0.205315    3.420229   1                             1/23      8/10     13/14 
 24 n      0.845840    1.602035    0.194471   1                             4/13      5/13     15/12 
 25 n      1.612879    2.768860    3.409385   1                             4/14      8/13     11/14 
 26 n      2.001821    0.961510    2.012665   1                             2/13      6/13     10/13 
 27 n      3.420229    2.653190    0.205315   1                             1/25      5/22     12/12 
 28 n      0.194471    0.845840    1.602035   1                             3/13       7/4      9/13