class A:
    def __init__(self, a, **kwargs):
        print("A", a)
        super().__init__(**kwargs)
 
 
class B:
    def __init__(self, b, **kwargs):
        print("B", b)
        super().__init__(**kwargs)
 
 
class C(A, B):
    pass
 
 
class D(B, A):
    pass
 
 
class E(A, B):
    def __init__(self, e, **kwargs):
        print("E", e)
        super().__init__(**kwargs)
 
 
class F(C, E):
    pass
 
 
C(a=1, b=2)
D(a=4, b=3)
E(a=6, b=7, e=5)
F(a=9, b=10, e=8)
print(*[klass.__name__ for klass in F.mro()], sep=' -> ')
 

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