def doComput(set numbers, int numOfBox, list box){
	for(num in numbers){
 		newNumbers = copy(numbers)
		newNumbers.remove(num)
		box[numOfBox] = num
		doComput(newNumbers, numOfBox + 1, box)
	}
	if numbers.isEmpty {
	check(box)//remember something if it is needed
	}
}