# type topo
# cell     3.500000     2.702900     3.498400    90.000000    90.000000    90.000000
12
  1 s      0.000000    0.000000    0.000000   0                             5/10       6/1       7/3      8/12 
  2 s      0.000000    1.351450    0.000000   0                             5/13      8/12       6/4       7/3 
  3 s      1.750000    1.351450    1.749200   0                            10/13      9/13     11/13     12/13 
  4 s      1.750000    0.000000    1.749200   0                            10/13     12/10      9/13     11/10 
  5 n      0.521500    2.027175    0.520912   1                             1/16      2/13     11/13 
  6 n      2.978500    2.027175    0.520912   1                             1/25      2/22     12/13 
  7 n      2.978500    0.675725    2.977488   1                             1/23      2/23      9/13 
  8 n      0.521500    0.675725    2.977488   1                             1/14      2/14     10/13 
  9 n      2.271500    0.675725    2.270112   1                             3/13      4/13      7/13 
 10 n      1.228500    0.675725    2.270112   1                             3/13      4/13      8/13 
 11 n      1.228500    2.027175    1.228288   1                             3/13      4/16      5/13 
 12 n      2.271500    2.027175    1.228288   1                             3/13      4/16      6/13