text: import random
  import string
  import re
  
  def random_string(prefix="", max_len=10):
      # symbols = string.ascii_letters + string.digits + string.punctuation + " " * 10
      symbols = string.ascii_letters + string.digits + " "*10
      return trim_spaces(prefix + "".join([random.choice(symbols) for _ in range(random.randrange(1, max_len))]))
  
  def trim_spaces(string):
      return re.sub(" +", " ", string).strip(" ")
  
  def random_username(prefix="", max_len=10):
      symbols = string.ascii_letters
      return prefix + "".join([random.choice(symbols) for _ in range(random.randrange(3, max_len))])
  