input: Write a function to search for a given input string within a predefined list of strings. If a match is found within the list, return "String matches"; otherwise, return "String doesn't match". If the given list is empty, return "List is empty".
  assert match_string(["First", "Second", "Third"], "Second") == "String matches"
  assert match_string(["First", "Second", "Third"], "Fourth") == "String doesn't match"
  assert match_string([], "Second") == "List is empty"
  assert match_string(["First", "Second", "Third"], "") == "String doesn't match"
output: def match_string(lst, s):
      if not lst:
          return "List is empty"
      if s in lst:
          return "String matches"
      return "String doesn't match"