input: Write a python function to classify points in a 3D space based on their coordinates.
  assert classify_points([(-1, -1, -1), (1, 1, 1), (0, 0, 0), (2, -2, 2)]) == [1, 2, 3, 3]
  assert classify_points([(3, 3, 3), (-2, -2, -2), (1, -1, 1), (-1, 1, -1)]) == [2, 1, 3, 3]
  assert classify_points([(0, 0, 0), (10, 10, 10), (-5, -5, -5)]) == [3, 2, 1]
output: def classify_points(points):
      def classify_point(x, y, z):
          if x < 0 and y < 0 and z < 0:
              return 1
          elif x > 0 and y > 0 and z > 0:
              return 2
          else:
              return 3
      
      return [classify_point(x, y, z) for x, y, z in points]