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class A:
L(A)=[A]+merge(L(O),[O])=[A]+merge([O],[O]))=[A]+[O]=[A,O]
class B:
L(B)=[B]+merge(L(O),[O])=[B]+merge([O],[O]))=[B]+[O]=[B,O]
class C:
L(C)=[C]+merge(L(O),[O])=[C]+merge([O],[O]))=[A]+[O]=[A,O]
class D(A,B):
L(D)=[D]+merge(L(A),L(B),[A,B])=[D]+merge([A,O],[B,O],[A,B])=?
class E(B,C):
L(E)=[E]+merge(L(B),L(C),[B,C])=[E]+merge([B,O],[C,O],[B,C])=?
class F(D,E):
pass |
