input: Write a function to create an instance of Point2D class and return the coordinates as a tuple.
  assert get_point2d_coordinates(3, 4) == (3, 4)
  assert get_point2d_coordinates(0, 0) == (0, 0)
  assert get_point2d_coordinates(-1, 5) == (-1, 5)
output: class Point2D:
      def __init__(self, x, y):
          self.x = x
          self.y = y
  
  def get_point2d_coordinates(x, y):
      point = Point2D(x, y)
      return (point.x, point.y)