input: from typing import Tuple, List
  
  def three_layer_neural_network(input_layer: List[float], hidden_layer: List[List[float]], output_layer: List[float]) -> float:
      """Create a 3-layer artificial neural network and compute the output.
      >>> three_layer_neural_network([2, 3], [[0.1, 0.4], [0.8, 0.6], [0.3, 0.9]], [0.3, 0.7])
      4.26
      """
      import numpy as np
      hidden_layer_output = np.dot(input_layer, hidden_layer)
      output = np.dot(hidden_layer_output, output_layer)
      return output
output:     import numpy as np
      hidden_layer_output = np.dot(input_layer, hidden_layer)
      output = np.dot(hidden_layer_output, output_layer)
      return output