input: from Crypto.Cipher import AES
  
  key = b'Sixteen byte key'
  
  def encrypt(plaintext):
      """
      Encrypts the given plaintext using the AES encryption algorithm in ECB mode.
      >>> encrypt(b'Hello, World!')
      b'\x9a\x8f\x83\xf1\x9b\x8e\x8f\xf1\x9b\x8e\x8f\xf1\x9b\x8e\x8f'
      """
      cipher = AES.new(key, AES.MODE_ECB)
      return cipher.encrypt(plaintext)
  
  def decrypt(ciphertext):
      """
      Decrypts the given ciphertext using the AES encryption algorithm in ECB mode.
      >>> decrypt(b'\x9a\x8f\x83\xf1\x9b\x8e\x8f\xf1\x9b\x8e\x8f\xf1\x9b\x8e\x8f')
      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)