# Intersection is an internal point:
# problem intersect 0 1 1 0 0 1
# problem intersect 1 0 1 0 0 1
# Intersection is an end point:
intersect 1 2 1 0 2 0
intersect 2 1 1 0 2 0
#Intersection is a tangency point
intersect 6 7 1 0 3 0
intersect 7 6 1 0 3 0
#Intersection is not a control point: multiplicity is known
intersect 2 8 1 0 4 1
# Intersection is an x-monotone curve:
#intersect 2 3 1 1 4
#intersect 3 2 1 1 4
# Intersection is an x-monotone curve stricktly contained in an input curve: 
#intersect 4 5 1 1 4
#intersect 5 4 1 1 4
