function Score () {
	this.val = 0
	this.taken = false

	this.setVal = setVal
	this.getVal = getVal

	this.isTaken = isTaken
	this.take = take
}

function take () {
	this.taken = true
}

function isTaken () {
	return this.taken
}

function setVal (x) {
	if (!this.isTaken ()) {
		this.val = x
		this.take ()
	}
}

function getVal () {
	return this.val
}