def test_equal_2(self): self.assertEqual(print_nums(2), '2')
def test_equal_4(self): self.assertEqual(print_nums(1009, 2), '1009\n0002')
def test_equal_1(self): self.assertEqual(print_nums(), '')
def test_equal_3(self): self.assertEqual(print_nums(1, 12, 34), '01\n12\n34')