input: from Crypto.Cipher import AES
  
  key = b'Sixteen byte key'
  
  def encrypt(plaintext):
      """Encrypt the given plaintext using AES encryption in ECB mode.
      >>> encrypt(b'It uses 16-byte key')
      b'>r\x9e+\xf8e\xa6\xc1L\x9d}\xd9mmdM'
      """
      cipher = AES.new(key, AES.MODE_ECB)
      return cipher.encrypt(plaintext)
  
  def decrypt(ciphertext):
      """Decrypt the given ciphertext using AES decryption in ECB mode.
      >>> decrypt(b'>r\x9e+\xf8e\xa6\xc1L\x9d}\xd9mmdM')
      b'It uses 16-byte key'
      """
      cipher = AES.new(key, AES.MODE_ECB)
      return cipher.decrypt(ciphertext)
output:     cipher = AES.new(key, AES.MODE_ECB)
      return cipher.decrypt(ciphertext)