old_contents: import unittest
  
  from find_password import find_password
  
  
  class TestFindPassword(unittest.TestCase):
      def test_find_password(self):
          assert find_password('abc', length=8) == '18f47a30'
  
new_contents: import unittest
  
  from find_password import find_password
  
  
  class TestFindPassword(unittest.TestCase):
      def test_find_password(self):
          assert find_password('abc', length=8) == '18f47a30'
          assert find_password('abc', length=8, complex=True) == '05ace8e3'
  
subject: Add test for part 2 of day 5.