function plus(a,b) {
	if (a === 0) {
		return b;
	} else {
		return plus(a-1, b+1);
	}
}
function mult(a,b) {
	if (a === 0) {
		return 0;
	} else {
		return plus(mult(a-1, b), b);
	}
}
exports.plus = plus;
exports.mult = mult;