# Tetrahedron
# Data: Exact Mathematics
4 4 6
 1   1  -1
-1   1   1
 1  -1   1
-1  -1  -1
3 0 2 1 
3 3 0 1 
3 2 3 1 
3 3 2 0 
0 1
0 2
0 3
1 2
1 3
2 3