#include <iostream>

int main()
{
	unsigned i;

	std::cout << "0 to 4:\n";
	i = 0;
	while (i != 5)
	{
		std::cout << "\t" << i << "\n";
		++i;
	}

	std::cout << "4 to 0:\n";
	i = 5;
	while (i != 0)
	{
		--i;
		std::cout << "\t" << i << "\n";
	}
}