class Hanoi {

	public void towerOfHanoi(int $diskCount, int $fromPole, int $toPole, int $viaPole) {
		if($diskCount == 1) {
			printf('Move disk from pole ' + $fromPole + ' to pole ' + $toPole + "\n");
		} else {
			$this->towerOfHanoi($diskCount - 1, $fromPole, $viaPole, $toPole);
			$this->towerOfHanoi(1, $fromPole, $toPole, $viaPole);
			$this->towerOfHanoi($diskCount - 1, $viaPole, $toPole, $fromPole);
		}
	}

}

class Program {

	public void main() {
		object $hanoi = new Hanoi();
		$hanoi->towerOfHanoi(4, 1, 2, 3);
	}

}