What does this Python snippet output?

1class A:
2    def __init__(self): print("A")
3class B(A):
4    def __init__(self): print("B"); super().__init__()
5class C(A):
6    def __init__(self): print("C"); super().__init__()
7class D(B, C):
8    def __init__(self): print("D"); super().__init__()
9D()