# type topo
# cell     1.732100     1.732100     2.000000    90.000000    90.000000    90.000000
4
  1 o      0.000000    0.000000    0.500000   0                             2/13      2/12      3/13       3/4      4/10      4/13 
  2 o      0.000000    0.000000    1.500000   0                             1/13      1/14       3/5      3/14      4/13      4/10 
  3 s      0.866050    0.000000    0.000000   1                             1/13      1/22      2/21      2/12 
  4 s      0.000000    0.866050    1.000000   1                             1/16      1/13      2/13      2/16