Порядок вызова с множественным наследованием

 A      B
| |   |   |
C D   E   F
| |   |   |
    G     H
      |
      I


user@ubuntu:~/Documents/Python/oop_python$ cat tt.py
class A:
    def call_me(self):
        print("A")

class C(A):
    def call_me(self):
        super().call_me()
        print("C")

class D(A):
    def call_me(self):
        super().call_me()
        print("D")

class B:
    def call_me(self):
        print("B")

class E(B):
    def call_me(self):
        super().call_me()
        print("E")

class F(B):
    def call_me(self):
        super().call_me()
        print("F")

class G(C, D, E):
    def call_me(self):
        super().call_me()
        print("G")

class H(F):
    def call_me(self):
        super().call_me()
        print("H")

class I(G, H):
    def call_me(self):
        super().call_me()
        print("I")


user@ubuntu:~/Documents/Python/oop_python$ python3.2 -i tt.py
>>> i = I()
>>> i.call_me()
A
D
C
G
I

Вопрос> Почему B, E, F не печатаются?

//            updated based on comments from delnan

user@ubuntu:~/Documents/Python/oop_python$ cat tt.py
class BaseClass():
    def call_me(self):
        print("BaseClass")
    pass

class A(BaseClass):
    def call_me(self):
        super().call_me()
        print("A")

class C(A):
    def call_me(self):
        super().call_me()
        print("C")

class D(A):
    def call_me(self):
        super().call_me()
        print("D")

class B(BaseClass):
    def call_me(self):
        super().call_me()
        print("B")

class E(B):
    def call_me(self):
        super().call_me()
        print("E")

class F(B):
    def call_me(self):
        super().call_me()
        print("F")

class G(C, D, E):
    def call_me(self):
        super().call_me()
        print("G")

class H(F):
    def call_me(self):
        super().call_me()
        print("H")

class I(G, H):
    def call_me(self):
        super().call_me()
        print("I")

user@ubuntu:~/Documents/Python/oop_python$ python3.2 -i tt.py
>>> i = I()
>>> i.call_me()
BaseClass
B
F
H
E
A
D
C
G
I