# type topo
# cell     2.500000     2.500000     2.000000    90.000000    90.000000   120.000000
8
  1 v      0.000000    0.000000    0.000000   0                             2/13      2/12      3/13       4/4       5/1       6/0       7/9      8/12 
  2 v      0.000000    0.000000    1.000000   0                             1/13      1/14      3/13       4/4       5/1       6/1      7/10      8/13 
  3 s      0.750000    0.433013    0.500000   1                             1/13      2/13      4/13      5/13 
  4 s      1.750000    0.433013    0.500000   1                             1/22      2/22      3/13      5/13 
  5 s      1.250000    1.299038    0.500000   1                             1/25      2/25      3/13      4/13 
  6 s      0.500000    1.732051    1.500000   1                             1/26      2/25      7/13      8/13 
  7 s     -0.500000    1.732051    1.500000   1                             1/17      2/16      6/13      8/13 
  8 s      0.000000    0.866025    1.500000   1                             1/14      2/13      6/13      7/13