#include <iostream>
#include <functional>

int
main()
{
	std::function<bool(int)> f(
		[] (int n) -> bool {
			return !(n % 3 || n % 5); 
		}
	);
	
	if (f(15)) std::cout << "stfu!" << std::endl;
	if (!f(8)) std::cout << "stfu anyway!" << std::endl;
	return 0;
}