Number of points in the list points: 4
Point: 1, 2
Point: 3, 4
Point: 5, 6
Point: 6, 7
Point: 8, 9
Point: 10, 11
Point: 12, 13
Point: 14, 15
p6 is NOT member of points
p6 is member of more_points
p6 is member of point_list
Point: 6, 7
Point: 5, 6
Point: 3, 4
Point: 1, 2