struct
{
	struct A<x>()
	{
		struct AA<y>(){};
		struct AB<y>()
		{
			struct ABA<z>()
			{
			};
		};
	};
	struct B<x>()
	{
		struct BA<y>()
		{
			a = A<y>::AB<x>::ABA<y>();
		};
		struct BB<y>()
		{
			struct BBA<z>()
			{
			};
			struct BBB<z>(p:z)
			{
				a = BA<z>();
			};
		};
	};
	struct C(delete){};
	a = Fn<>()->A<C>::AB<B<C>>::ABA<C>{return B<B<C>>::BB<B<C>::BB<C>>::BBB<C>(admit<C>()).a.a;};
}main;