input: Write a python function to create an instance of the Point class, move the point, and retrieve its x and y positions.
  assert move_and_get_position(0, 0, 3, 4) == (3, 4)
  assert move_and_get_position(1, 1, 5, 6) == (6, 7)
  assert move_and_get_position(-2, -3, 2, 2) == (0, -1)
output: class Point:
      def __init__(self, x, y):
          self.x = x
          self.y = y
      
      def move(self, dx, dy):
          self.x += dx
          self.y += dy
  
  def move_and_get_position(x, y, dx, dy):
      point = Point(x, y)
      point.move(dx, dy)
      return (point.x, point.y)