input: from typing import Callable
  
  def generate_random_string(length: int) -> str:
      """
      Generate a random string of given length.
      >>> generate_random_string(6)
      'abcxyz'  # Example output, actual output may vary due to randomness
      >>> generate_random_string(8)
      'uvwxyzab'  # Example output, actual output may vary due to randomness
      """
      import random
      import string
      letters = string.ascii_lowercase
      return ''.join(random.choice(letters) for i in range(length))
output:     import random
      import string
      letters = string.ascii_lowercase
      return ''.join(random.choice(letters) for i in range(length))