input: 
  from typing import List
  
  def search_string_in_list(user_input: str, string_list: List[str]) -> str:
      """ Searches the given user input in a list of strings and returns a message indicating whether a match was found.
      >>> search_string_in_list("First", ["First", "Second", "Third"])
      "String matches"
      >>> search_string_in_list("Fourth", ["First", "Second", "Third"])
      "String doesn't match"
      """
      for string in string_list:
          if user_input == string:
              return "String matches"
      return "String doesn't match"
  
output:     for string in string_list:
          if user_input == string:
              return "String matches"
      return "String doesn't match"