def test_license_number(self): self.assertEqual("a-b-c-d-f-d-d-f", license_number("a-bc-dfd-df", 1)) self.assertEqual("ab-cd-fd-df", license_number("a-bc-dfd-df", 2)) self.assertEqual("ab-cdf-ddf", license_number("a-bc-dfd-df", 3)) self.assertEqual("abcd-fddf", license_number("a-bc-dfd-df", 4)) self.assertEqual("abc-dfddf", license_number("a-bc-dfd-df", 5))