input: from typing import List
  
  def predict_class_labels(data: List[float]) -> int:
      """Predict the class labels of a given set of data with 4 features: Length, Width, Height and Weight.
      >>> predict_class_labels([1.0, 2.0, 3.0, 4.0])
      1
      >>> predict_class_labels([5.0, 6.0, 7.0, 8.0])
      0
      """
output:     if data[0] + data[1] + data[2] + data[3] < 20.0:
          return 1
      else:
          return 0