input: 
  def encrypt(plaintext: str) -> bytes:
      """ Encrypts the given plaintext using AES encryption in ECB mode.
      >>> encrypt('Hello, World!')
      b'\x8f\xe8e\xbaJ\x85Y\xefQ\x9c\xc75\x9a\xfdB\xcd'
      """
      key = b'Sixteen byte key'
      cipher = AES.new(key, AES.MODE_ECB)
      return cipher.encrypt(plaintext.encode())
  
  def decrypt(ciphertext: bytes) -> str:
      """ Decrypts the given ciphertext using AES decryption in ECB mode.
      >>> decrypt(b'\x8f\xe8e\xbaJ\x85Y\xefQ\x9c\xc75\x9a\xfdB\xcd')
      'Hello, World!'
      """
      key = b'Sixteen byte key'
      cipher = AES.new(key, AES.MODE_ECB)
      return cipher.decrypt(ciphertext).decode()
  
output:     
      key = b'Sixteen byte key'
      cipher = AES.new(key, AES.MODE_ECB)
      return cipher.decrypt(ciphertext).decode()
  