class Cat {
	func sayHello() -> String {
		return "Meow!"
	}
}

func schrodingersCat() -> Cat? {
	// Open the box!
	let cat = [0, 1].randomElement()

	if cat == 1 {
		return Cat()
	}
	else {
		return nil
	}
}

if let kitty = schrodingersCat() {
	print(kitty.sayHello())
}
else {
	print("Poor kitty.")
}