input: Write a function to take a list of strings and a user input string, and search for any matches using regular expressions. If a match is found, return True, otherwise return False. If the list of strings is empty, return True.
  assert search_for_match(["First", "Second", "Third"], "Sec")==True
  assert search_for_match(["First", "Second", "Third"], "Fourth")==False
  assert search_for_match(["First", "Second", "Third"], "St")==False
  assert search_for_match([], "Whatever")==True
output: def search_for_match(string_list, user_input):
      if not string_list:
          return True
      import re
      for s in string_list:
          if re.search(user_input, s):
              return True
      return False