#!/usr/bin/env python3

#        A       C
#        B       D      (X)      A
#                E

class A(object): pass
class B(A): pass
class C(object): pass
class D(C): pass
class E(B, D, A): pass
print(E.mro())

#class A(object): pass
#class B(A): pass
#class C(object): pass
#class D(C): pass
#class X(object): pass
#class E(B, D, X, A): pass
#print(E.mro())