input: 
  from typing import List
  
  
  def random_string(length: int) -> str:
      """ Generate a random string of given length consisting of lowercase letters.
      >>> random_string(6)
      'abcdef'
      >>> random_string(6)
      'ghijkl'
      """
  
output:     
      import random
      import string
  
      return ''.join(random.choice(string.ascii_lowercase) for _ in range(length))
  