test_struct.lmp (written by ASE) 

5 	 atoms 
2  atom types
0.0                      20  xlo xhi
0.0                      20  ylo yhi
0.0                      20  zlo zhi


Atoms 

     1   1   0.0                      10                      10                      10
     2   2   0.0                      10                       8                      10
     3   2   0.0                       8                      10                      10
     4   2   0.0                      10      12.000000000000002                      10
     5   2   0.0      12.000000000000002                      10                      10