input: Write a python function to predict labels based on feature values.
  assert predict_label([15, 25]) == "A"
  assert predict_label([15, 15]) == "B"
  assert predict_label([5, 25]) == "C"
  assert predict_label([10, 20]) == "C"
output: def predict_label(features):
      x, y = features
      if x > 10 and y > 20:
          return "A"
      elif x > 10:
          return "B"
      else:
          return "C"