int main() {
	int a, b, c, d, e, f, g;
	scanf("%d %d %d %d", &a, &b, &c, &d);

	g = c * 60 + d - a * 60 - b;
	e = g / 60;
	f = g - e * 60;



	printf("%d %02d", e, f);

	return 0;
}```