8  3  0  0
   0    -5  5  0
   1    -5  -5  0
   2    5  -5  0
   3    5  5  0
   4    -5  5  -10
   5    -5  -5  -10
   6    5  -5  -10
   7    5  5  -10
# Generated by tetgen -pq prism.poly