# type topo
# cell     3.989900     3.989900     1.467800    90.000000    90.000000    90.000000
16
  1 s      0.339540    0.000000    0.366950   0                             3/10      4/13       9/4       9/3 
  2 s      1.655410    0.000000    1.100850   0                             3/10      4/14     10/13     10/14 
  3 s      0.997475    3.331965    0.733900   0                             1/16      2/16     11/13     11/14 
  4 s      0.997475    0.657935    0.000000   0                             1/13      2/12     12/13     12/12 
  5 s      2.334490    1.994950    1.100850   0                             7/14      8/13     13/13     13/14 
  6 s      3.650360    1.994950    0.366950   0                             7/13      8/13     14/22     14/21 
  7 s      2.992425    1.337015    0.000000   0                             5/12      6/13     15/13     15/12 
  8 s      2.992425    2.652885    0.733900   0                             5/13      6/13     16/13     16/14 
  9 s      3.650360    0.000000    1.100850   0                             1/22      1/23     15/13     16/11 
 10 s      2.334490    0.000000    0.366950   0                             2/13      2/12     15/13     16/10 
 11 s      0.997475    2.652885    0.000000   0                             3/13      3/12     13/13     14/12 
 12 s      0.997475    1.337015    0.733900   0                             4/13      4/14     13/13     14/13 
 13 s      1.655410    1.994950    0.366950   0                             5/13      5/12     11/13     12/13 
 14 s      0.339540    1.994950    1.100850   0                              6/4       6/5     11/14     12/13 
 15 s      2.992425    0.657935    0.733900   0                             7/13      7/14      9/13     10/13 
 16 s      2.992425    3.331965    0.000000   0                             8/13      8/12      9/15     10/16