#include <vector>
#include <iostream>
#include <string>
#include <ostream>
#include <map>
#include <set>
#include <bitset>
#include <cmath>
#include <iomanip>
#include <algorithm>
#include <list>
#define rep(i, n) for (int i = 0; i < (n); i++)
using namespace std;

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