class A:
    def method(self):
        print("A's method called")     
class B(A):
    def method(self):
        print("B's method called")
        super().method()       
class C(A):
    def method(self):
        print("C's method called")
        super().method()
       
class D(B, C):
    def method(self):
        print("D's method called")
        super().method()   
d = D()
d.method()