input: Write a function to determine if a given list of strings contains any match to the user's input string. If a match is found, return "String matches"; otherwise, return "String doesn't match".
  assert search_string(["First","Second","Third"], "Second") == "String matches"
  assert search_string(["First","Second","Third"], "Fourth") == "String doesn't match"
  assert search_string(["First","Second","Third"], "first") == "String doesn't match"
  assert search_string(["First","Second","Third"], "Third") == "String matches"
  assert search_string(["First","Second","Third"], "Typo") == "String doesn't match"
output: def search_string(string_list, user_input):
      if user_input in string_list:
          return "String matches"
      else:
          return "String doesn't match"