input: from Crypto.Cipher import AES
  
  key = b'Sixteen byte key'
  
  def encrypt(plaintext):
      """Encrypts the given plaintext using AES encryption in ECB mode.
      >>> encrypt(b'Hello, World!')
      b'8\xdajh#@\x9f/\xdd@\x06\\\xd0\x14f\x91\xff'
      """
      cipher = AES.new(key, AES.MODE_ECB)
      return cipher.encrypt(plaintext)
  
  def decrypt(ciphertext):
      """Decrypts the given ciphertext using AES decryption in ECB mode.
      >>> decrypt(b'8\xdajh#@\x9f/\xdd@\x06\\\xd0\x14f\x91\xff')
      b'Hello, World!'
      """
      cipher = AES.new(key, AES.MODE_ECB)
      return cipher.decrypt(ciphertext)
output:     cipher = AES.new(key, AES.MODE_ECB)
      return cipher.decrypt(ciphertext)