#include <bits/stdc++.h>

using namespace std;
void fast_io() {
    ios_base::sync_with_stdio(false);
    cin.tie(nullptr);
}

int main() {
    fast_io();
    int a, b, c, d;
    cin >> a >> b >> c >> d;
    if (a + c <= 31 + b) {
        cout << "1" << endl;
    } else if (a + d <= 31 + b) {
        cout << "2" << endl;
    } else {
        cout << "3" << endl;
    }
}