def test_case_1(self):
     self.assertEqual(lecture_wk4c.nfruits({'A': 1, 'B': 2, 'C': 3}, 'AC'), 3)
 def test_case_4(self):
     self.assertEqual(lecture_wk4c.nfruits({'A': 1, 'B': 1}, 'A'), 1)