def test_find_n_for_key_abcdef(self):
     input = 'abcdef'
     expected = 609043
     actual = Day4.find_n_for_key(input, 5)
     self.assertEqual(expected, actual)
 def test_find_n_for_key_pqrstuv(self):
     input = 'pqrstuv'
     expected = 1048970
     actual = Day4.find_n_for_key(input, 5)
     self.assertEqual(expected, actual)