1
-1 0 0 0 -1 0 0
0
1
-1 0 0 0 1 0 0
0
# BEGIN ARRANGEMENT
# number_of_vertices
3
# number_of_edges
2
# number_of_faces
1
# BEGIN VERTICES
0 4 1 -1 0 0
3
4 4 1 0 -1 0
4
4 4 1 0 1 0
5
# END VERTICES
# BEGIN EDGES
1 0 1 1 -1 0 0 0 -1 0 0
5
5
2 0 0 1 -1 0 0 0 1 0 0
5
5
# END EDGES
# BEGIN FACES
# BEGIN FACE
0 1 
# number_of_outer_ccbs
0
# number_of_inner_ccbs
1
# halfedges_on_inner_ccb
4
1 0 3 2 
# number_of_isolated_vertices
0
6
# END FACE
# END FACES
# END ARRANGEMENT
