trefoil_lattice.txt

1 -1  1
1  0  1
1  1  1
1  2  1
0  2  1
-1  2  1
-1  1  1
-1  0  1
-1  0  0
0  0  0
1  0  0
2  0  0
2  0  1
2  0  2
1  0  2
0  0  2
0  0  1
0  1  1
0  1  0
0  1 -1
1  1 -1
1  0 -1
1 -1 -1
1 -1  0