#include <iostream>
using namespace std;
 
struct A
{
    struct B{};
 
    template <typename T>
    struct EverythingIsFine
    {
        using Outer = T;
        using Inner = typename T::B::B::B::B::B::B;
    };
 
    using ItWillBeOkay = EverythingIsFine<B>; // Ok
    using InnerProblem = ItWillBeOkay::Inner; // Not ok
    using OuterProblem = decltype(B().ItWillBeOkay::Outer::B::B::B
                                     ::B::B::B::~B()); // Not even CLOSE to okay
};
 
 
int main() {
	// your code goes here
	return 0;
}

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