#include<bits/stdc++.h>
using namespace std;
using ll=long long;

int main(){

    cin.tie(nullptr);
    ios::sync_with_stdio(false);

    ll A,B,C,D;
    cin>>A>>B>>C>>D;
    B+=(31-A);
    if(C<=B)cout<<1<<endl;
    else if(D<=B)cout<<2<<endl;
    else cout<<3<<endl;
    
}