#include <iostream>

using namespace std;

int main()
{
	cin.tie(nullptr);
	ios::sync_with_stdio(false);

	int A, B, C, D;
	cin >> A >> B >> C >> D;

	if (A + C <= 31 + B)
		cout << "1\n";
	else if (A + D <= 31 + B)
		cout << "2\n";
	else
		cout << "3\n";

	return 0;
}