def move_tower(height, from_pole, to_pole, with_pole):
    """
    >>> move_tower(3, 'A', 'B', 'C')
    moving disk from A to B
    moving disk from A to C
    moving disk from B to C
    moving disk from A to B
    moving disk from C to A
    moving disk from C to B
    moving disk from A to B
    """
    if height >= 1:
        move_tower(height - 1, from_pole, with_pole, to_pole)
        move_disk(from_pole, to_pole)
        move_tower(height - 1, with_pole, to_pole, from_pole)


def move_disk(fp, tp):
    print("moving disk from", fp, "to", tp)


def main():
    height = int(input("Height of hanoi: ").strip())
    move_tower(height, "A", "B", "C")


if __name__ == "__main__":
    main()