OFF
11 7 0
# vertices
-1 -1 1
-1 1 1
1 1 1
1 -1 1
-1 -1 -1
-1 1 -1
1 1 -1
1 -1 -1
2 2 2
3 2 2
3 3 3
# facets
3 3 2 1
3 3 1 0
4 0 1 5 4
4 6 5 1 2
4 3 7 6 2
4 4 7 3 0
4 4 5 6 7
3 8 9 10