def yesno(question: str) -> bool:
    """Simple Yes/No Function."""
    prompt = f"{question} ? (y/n): "
    ans = input(prompt).strip().lower()
    if ans not in ["y", "n"]:
        print(f"{ans} is invalid, please try again...")
        return yesno(question)
    if ans == "y":
        return True
    return False