# system with periodic bonds in xy direction

3 atoms
3 bonds

1 atom types
1 bond types

0 3 xlo xhi
0 3 ylo yhi

Atoms

1 1 1 0.5 0.5 0
2 1 1 1.5 1.5 0
3 1 1 2.5 2.5 0

Bonds

1 1 1 2
2 1 2 3
3 1 3 1