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class B {
public:
    int b3;
};

namespace NS01
{
    class A {
    public:
        int a1;
    };
    
    class B {
    public:
        A m_a;
        int b1;
    };
    
    namespace NS02
    {
        class A {
        public:
            int aa;
        };
        
        class B {
        public:
            int bb;
            class BB {
            public:
                int bb2;
            };
        };
    }
    
    template<typename T1, typename T2>
    T1 * 
    Func()
    {
        return new T1;
    }
    
    B * 
    Func2()
    {
        return new B;
    }
}

namespace NS02
{
    class A {
    public:
        int a2;
    };
    
    class B {
    public:
        int b2;
    };
    
    class C {
    public:
        int c2;
    };
}

//using namespace NS01;

int main(int argc, char **argv)
{
    using namespace NS01::NS02;
    using NS02::C;
    namespace NS002 = NS01;
    namespace NS003 = NS002::NS02;
    using NS003::B;
    using NS01::Func;
    using NS01::Func2;
//    using namespace NS02;
//    namespace B = NS01::NS02;
//    using NS01::NS02::B;
//    B::BB bb;

    A a1;
    NS01::B b1;
    B b2;
    NS002::B b3;
    NS003::B b4;
    C c1;
    
    a1; // -> aa
    b1; // -> b1
    b2; // -> bb
    b3; // -> b1
    b4; // -> bb
    c1; // -> c2
    b1.m_a.a1;

    Func<B, short>()->bb; // -> bb
    Func2()->b1;

    return 0;
}